GMAT Reading Comprehension (RC) | Re: GMATPREP ChallengeQ -More selective than most chemical pesti

1. The passage is primarily concerned with
A. explaining why until recently scientists failed to recognize the risks presented by biocontrol agents.
B. emphasizing that biocontrol agents and chemical pesticides have more similarties than differences.
C. suggesting that only certain biocontrol agents should be used to control plant or animalpasts.
D. arguing that biocontrol agents involve risks, some of which may not be readily discerned.
E. suggesting that mishaps involving biocontroll agents
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