Bunuel
Since Senator Johnston revised the estate tax code in a way that allows grandchildren living outside the United States to claim special exemptions, many of them moving abroad with the expectation of a large inheritance.
A. Since Senator Johnston revised the estate tax code in a way that allows grandchildren living outside the United States to claim special exemptions, many of them moving abroad with the expectation of
B. Because Senator Johnston's revisions to the estate tax code allow grandchildren living outside the United States to claim special exemptions, many of these descendants have moved abroad, expecting
C. Grandchildren living outside the United States can claim special exemptions, according to Senator Johnston's revisions to the estate tax code, and so many have moved abroad and these descendants are expecting
D. The revisions to the estate tax code, written by Senator Johnston, allow grandchildren living outside the United States to claim special exemptions, so many of them had moved abroad, anticipating
E . Because Senator Johnston had revised the estate tax code, which allows grandchildren living outside the United States for claiming special exemptions, which causes them to move abroad, in anticipation of
Magoosh Official Explanation:
Choice (A): Notice that after the "since" clause, we get a participial phrase, "many … moving abroad." This sentence makes the famous missing verb mistake! (A) is incorrect.
Choice (B) is grammatically correct and clear. This is promising.
Choice (C) is logically suspect. We start by talking about "grandchildren living outside the US" and then go on to say "so many have moved abroad"—wait! If they already were living abroad, how could they move abroad? The people who are already abroad have to be different from those who chose to move abroad, and this choice does not make these two groups clear. (C) is incorrect.
Choice (D) repeats this same logical problem: the "them" seems to refer to the people living abroad, so how could they move abroad? Choice (D) is incorrect.
Choice (E) makes an idiom mistake. The correct idiom is X allows A to do Y, not "X allows A for doing Y." Also, the antecedent of the pronoun "which" is an action, which is not a legitimate antecedent for a pronoun. Choice (E) is incorrect.
The only possible answer is (B).