It's quite clear that parallelism is being tested here, but cmon Veritas "like" to introduce examples? I've never seen this accepted on the GMAT. I know this stuff changes all the time, but at least in the last 3 years I've always observed that when Like is used to introduce examples it is incorrect. Perhaps this is because so many young people, particularly Americans, speak saying "like". "Like you know, whatever"....lol
(A) are being helped
by lower defense spending, a drop in outlays for benefits like Medicaid, and proceeds from the sales of General Motors and Chrysler, the automakers
(B) have been helped
by lower defense spending, a drop in outlays for benefits like Medicaid, and
by proceeds from the sales of General Motors and Chrysler, automakers
(C) have been helped
by lower defense spending, a drop in outlays for benefits like Medicaid, proceeds from the sales of General Motors and Chrysler, and
by the automakers
(D) are being helped
by lower defense spending,
by a drop in outlays for benefits like Medicaid, and
(by) proceeds from the sales of General Motors and Chrysler, the automakers
(E) were helped by lower defense spending and a drop in outlays for benefits like Medicaid,
also by proceeds from the sales of General Motors and Chrysler, the automakers
E requires a conjunction.
Official Explanation:
The most obvious decision point in this problem is the verb choice at the beginning, but it is a false decision point! All of these tenses create a logical timeline, so you need to look elsewhere for your decisions. At the end of the choices you have a series that needs to be parallel. Choice B violates that standard by adding an additional "by" in front of "proceeds." C does it in front of "the automakers," and D does the same in front of "a drop". In each case, either all items need "by" or only the first one needs "by," so all are incorrect. Choice E improperly connects the list, as "..., also by" is not a valid connector after a comma. Only choice A properly connects the list and keeps it parallel.