帮忙看看这道题

hardfish

School integration plans that involve busing between suburban and central-city areas have contributed, according to a recent study, to (significant increases in housing integration, which, in turn, reduces) any future need for busing.

answer is A.
which 指代的中心词是 increases， 为什么还用 reduces , 不是 reduce ?

justag

The which clause can also describes the nearest prep phrases, I think. Can you quote the other choices? Maybe it's easier to tell.

desertwolf

我觉得which修饰的是integration.你把它放回定语从句中就会发现，integration 比increases更加合理和贴近句子的本意。

同意楼上justag的观点，修饰语一般都就近前饰。如何避免修饰语的歧义也是ETS考察的重点之一