Great question! I like the fact that you are reading
The Economist and thinking about these issues.
sgangs
"The Indian government and public had been outraged by her arrest last month, which she said involved handcuffs, strip-searching and time in the lock-up with common criminals and drug addicts."
This is a sentence from the Economist. What I would like to know is whether the use of "which" in "arrest last month, which" is acceptable in GMAT. Although used to describe "arrest", "which" is not following it, but it is rather following a modifier - that I feel is not a "mission critical" one. After all, this is a very important news and the arrest automatically refers to "her". So, is this a justifiable use in GMAT?
First, let me clarify that we are speculating here. We can talk about what the GMAT tests and how they test it, but since we are talking about a sentence from a news source, we can't be 100% certain what the GMAT would do. But I think we can get close.
The GMAT is pretty strict when it comes to modification. They want the modifier as close as possible to the word that is modified. In this sentence, the modifier starting with "which" is pretty close to "arrest," which you rightly point out. It would really depend on the other options that you were given in a question. I could see this being the right answer if all the other answer choices are worse. But if you find a sentence like the following one in the answer choices, then that would be the answer you should choose:
"The Indian government and public had been outraged by her last-month arrest, which she said involved handcuffs, strip-searching and time in the lock-up with common criminals and drug addicts."
In this sentence, the modifier and the word being modified are as close as they could possibly be. This is what the GMAT likes to see. But we have another thing to consider now—is the style better? Do is read easily? The only reason that I bring this up is because "last-month arrest" is a little strange, but probably not strange enough to make it wrong.
I hope this helps!
Cheers,
Kevin