白勇语法的一题

redli

The growth of the railroads led to the abolition of local times, which was determined by when the sun reached the observer's meridian and differing from city to city, and to the establishment of regional times.
（A）which was determined by when the sun reached the observer's meridian and differing
（B）which was determined by when the sun reached the observer's meridian and which differed
（C）which were determined by when the sun reached the observer's meridian and differing
（D）determined by when the sun reached the observer's meridian and differed
（E）determined by when the sun reached the observer's meridian and differing
问题：答案选E，可我觉得C似乎更好，因为E感觉“determined”可能修饰前面整个句子，但C则很清楚修饰“ local times”

openview

C中determining容易理解成与determined并列的which从句的谓语。

GMAT追求简洁，能用短语则不用句子。

chnp

一般来说which都是修饰中心词的，这里的中心词应该是abolition，但这个which显然是指的是local times。所以这里避免用which比较好？（除了引为简洁外。）
请牛g牛j们指教。

justag

It's clear that the clause or prases describe local times.

For C, which were determined... and (which) differed... should be ok (please refer to choice B).You won't argue "which clause" can be followed by phrases to describe the same entity, right? So, differing is not right. Moreover, GMAT emphasizes parallelism, the second which is preferred (just like the case of multiple that clauses).

For E, it's just two phrases, one is in the format of -ed and the other
-ing.It's easy to determine whether to choose ed or ing, right?

Hehe, I did this problem wrong the first time and now think it right, I guess