Since 2010, the proportion of mosquito infestations in Cervances resis

Question

Since 2010, the proportion of mosquito infestations in Cervances resistant to the household insecticide proustein has increased considerably. Mosquitoes can rapidly become resistant to a household insecticide when it is used indiscriminately or when people fail to administer it as instructed. As proustein has not been used indiscriminately, public health officials theorize that the increase in proustein resistant mosquitoes is primarily a result of people failing to administer it as instructed.

Which of the following, if true of Cervances, provides most support for the health officials' theory?

A. The mosquitos’ resistance to several other commonly used household insecticides has not increased since 2010 in Cervances.
B. Proustein emanates an unpleasant smell that most people require a few days to get accustomed to. 
C. At the time it was introduced, proustein was much more effective in eliminating mosquito infestations than any other household insecticides used for such infestations at the time.
D. A large number of Cervancians never seek help from pest control experts when they have a mosquito infestation.
E. Cervancian health clinics provide household insecticides to their patients without generating any profits from their sale.

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pappal · Answer

A. talks about some other insecticide so not relevant. OUT
B. it actually supports what is exclusively denied in the argument not the conclusion, like if people take a time to get accustomed to its smell so wont be motivated to use it indiscriminately. OUT
C. it actually asserts a generalization regarding insecticides and not on what the health official ties to establish. OUT
E. focuses on the distribution of the insecticides by the health clinics without profits. though seems tempting that getting it cheaper will result in its indiscriminate usage, but its actually opposing what's exclusively denied by the health experts. OUT
D. this option clearly supports the conclusion by focusing on the reason why people fail to use as instructed, non taking the help from the pest control experts.  BEST CHOICE

Sosoeb · Answer

How B is the correct answer please explain.

ExpertsGlobal5 · Answer

B is the best choice.

Video explanation:

https://www.youtube.com/watch?v=PihrwRRcKmk

Tinytrotter · Answer

I feel D is a stronger answer choice than B. I get the logic that because people are not taking help from pest control experts, they can use it indiscriminately but they can also just as easily use it incorrectly.

B gives a very weak suggestion point that because it has a particular smell that most people require a few days to get used to, this will keep the indisciminate usage in check. It is an assumption that an unpleasant smell is big enough of a deterrent to keep the usage in check, it is not mentioned anywhere in the question. Even if we compare it to real life, when dealing with a mosquito infestation - priority is to get rid of infestation and most people would not fuss over something like smell.

Hence, I feel D is a better choice than B.

Since 2010, the proportion of mosquito infestations in Cervances resis

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GMAT Critical Reasoning (CR) Questions

Since 2010, the proportion of mosquito infestations in Cervances resis

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards