Official Solution:A proposed law would require citizens to bring photo ID to polling places when they vote to curb potential fraud.A. A proposed law would require citizens to bring photo ID to polling places when they vote to curb potential fraud.
B. To curb potential fraud, a proposed law would require citizens to bring photo ID to polling places when they vote.
C. A proposed law will require citizens to curb potential fraud by bringing photo ID to polling places when they vote.
D. A proposed law will curb potential fraud by requiring citizens to vote at polling places with photo ID.
E. To curb potential fraud, a proposed law requires citizens to bring photo ID to polling places when they vote.
This question is pretty much 100% about meaning.
(A) A proposed law would require citizens to bring photo ID to polling places when they vote to curb potential fraud
I think we would all love to vote to curb potential fraud, but that's clearly not the intended meaning of the sentence. (A) is gone
(B) To curb potential fraud, a proposed law would require citizens to bring photo ID to polling places when they vote
This looks good. In order to curb potential fraud, a proposed law would make people bring ID when the vote. And the verb "would" makes sense, too: the proposed law isn't in effect yet, so the conditional is correct. Keep (B)
(C) A proposed law will require citizens to curb potential fraud by bringing photo ID to polling places when they vote
There are a few issues here. "Will require" is a little bit too certain, since the law has only been proposed; "would" is better. It's a little bit of a stretch to say that citizens "curb potential fraud by bringing photo ID to polling places," but that's not necessarily wrong -- it just makes more sense to say that the law curbs fraud by requiring ID, as in answer choice (B). And "they" is a little bit further from "citizens" than we'd ideally like.
There's no single factor that makes (C) DEFINITELY wrong, but there's enough goofiness here to make it an inferior choice to (B)
(D) A proposed law will curb potential fraud by requiring citizens to vote at polling places with photo ID
The phrase "polling places with photo ID" makes it sound like the polling places themselves have photo ID, and that doesn't make much sense. "Will" is also not ideal here. (D) is out
(E) To curb potential fraud, a proposed law requires citizens to bring photo ID to polling places when they vote
"Requires" is the wrong verb tense here, since the law hasn't taken effect yet. "They" is also arguably a little bit ambiguous. And sure, pronoun ambiguity isn't an absolute rule (as discussed in this YouTube video), but (B) is clearly better than (E)
Answer: B