Explanation
This question asks for the purpose of the second
paragraph. We've already determined what that is: it's to describe the how the
attributes of these galaxies are related to past and future events. We look for
an answer choice fitting that description. Choice (A) appears to be right on
the mark. (B) is too narrow; not all the formations are discussed, and events
other than formations are discussed. (C) is too ambitious, because we are not
told that this account is comprehensive, nor is it exactly a theory. Plenty of
questions are identified as unanswered. (D) is out because no other galaxies in
the Local Group are mentioned in the passage. (E) has
a similar problem in that popular assumptions are not discussed.
The correct answer is (A).
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