Question

The author's argument that destroying bot-flies and mosquitoes would be a beneficial action is most weakened by all of the following except __________.

• A. parasites have an important role to play in the regulation of populations
• B. the elimination of any species can have unpredictable effects on the balance of nature
• C. the pests themselves are part of the food chain
• D. these insects have been introduced to the area by human activities
• E. elimination of these insects would require the use of insecticides that kill a wide range of insects

Answer 1

The correct option is D these insects have been introduced to the area by human activities

Here options A, B, C and E give reasons why destroying these insects might be a mistake. D is the correct answer because it suggests that eliminating these insects might not be wrong, since they are not even natural inhabitants of the area. So, D is the correct answer.