The Rise in Free Do-it-Yourself Instructions on the Internet.

Question: The rise in free, do-it-yourself instructions on the Internet for home repairs has led to a decrease in revenue for home service technicians and an increase in the number of injuries caused by people who have attempted home repairs themselves. Unfortunately, not all of the do-it-yourself instructions on the Internet are written as well as they should be.

Which of the following can be inferred from the argument above?

(A) The number of people who are not home repair technicians and who have been injured while attempting home repairs has increased.
(B) Most people who are injured while attempting home repairs have done so while following instructions found in free do-it-yourself instructions on the Internet.
(C) The overall sale of online do-it-yourself home repair instructions by home service technicians has not been equal to the loss of revenue the technicians have incurred due to free offerings of this sort of material.
(D) Most free do-it-yourself home repair instructions found on the Internet do not provide enough clear information regarding safety precautions.
(E) As more free do-it-yourself instructions for home repairs are made available on the Internet, home service technicians will suffer more losses in revenue.

“The Rise in Free Do-it-Yourself Instructions on the Internet.” – is a GMAT Critical question. This particular GMAT Critical Reasoning topic has been taken from the book ‘GMAT Prep Plus’. In this particular topic, candidates need to choose the option that best suits the passage. GMAT critical reasoning tests the logical and analytical skills of the candidates. Critical reasoning in GMAT requires candidates to find the strengths and weaknesses of the argument, or find the logical flaw in the argument.  The GMAT CR section contains 10 -13 GMAT critical reasoning questions out of 36 GMAT verbal questions.

Answer: C
Explanation: This is a GMAT critical reasoning question. An assumption is an implied hypothesis. So we are looking for something that is implied in the argument. In case it is wrong or maybe disable the argument.

The argument states- The rise in free, do-it-yourself instructions on the Internet for home repairs has led to a decrease in revenue for home service technicians and an increase in the number of injuries caused by people who have attempted home repairs themselves. Unfortunately, not all of the do-it-yourself instructions on the Internet are written as well as they should be.

Let us consider the given assumptions to check the best one which favour the given argument.

(A) The number of people who are not home repair technicians and who have been injured while attempting home repairs has increased.
In option A, it can be seen that people doing home repairs themselves are causing more injuries. But it is not mentioned to whom injuries are given. Hence it is not known if they themselves are being injured. So option A is incorrect. 
(B) Most people who are injured while attempting home repairs have done so while following instructions found in free do-it-yourself instructions on the Internet.
In option B it is not mentioned who is injured. So, option B is incomplete. 
(C) The overall sale of online do-it-yourself home repair instructions by home service technicians has not been equal to the loss of revenue the technicians have incurred due to free offerings of this sort of material.
In option C, it is mentioned that the revenue of home service technicians has gone down due to unrestricted DIY instructions. Hence, the gain they might have had is not equal to the loss they mourned due to free offerings. Hence there we see an overall loss. We can further see that there is no effort for making up for the loss since. Therefore, option C is the correct answer. 
(D) Most free do-it-yourself home repair instructions found on the Internet do not provide enough clear information regarding safety precautions.
Option D states about DIY instructions. But it is not good enough to be followed. Also, there is no mention of which one is free and which ones are paid. So, option D is incomplete. 
(E) As more free do-it-yourself instructions for home repairs are made available on the Internet, home service technicians will suffer more losses in revenue.
In option E there is absolutely no reference for any future. Hence this is incorrect. 

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