Explanation
From the last couple of questions, we have sharpened our
understanding of the passage, so we might be able to predict the answer to this
question. The author would most likely say that it's necessary not to look at
just functional similarity of the two species, but also what's happening in the
neighboring communities, since not doing
so was the problem introduced in line 10. Choice (A) is a strong statement, but
it's consistent with those ideas and may be correct. Choice (B) is the opposite
of the author's point, so it's out. Choice (C) is irrelevant, and choice (E)
misses the point of considering neighboring communities. We are left with (A)
and (D). (D) is similar to (A) and our prediction, but it's safer, and it must
be true that the author believes it. There must be an objective defect with
(A). Looking more closely at the statement and the author's language, we can
establish that the author has not indicating that considering neighboring
communities would solve the problem he has identified; in such a case, the
mystery may still be unsolved, or there may even be other problems, in the view
of the author, making a precise determination about blocking out impossible.
The correct answer is (D).
Passage 22
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