86 OG-11，这题的正确答案为什么是C，B和D为什么都不对呢？

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

which引导定语从句修饰local times，定语从句谓语用复数were 排除A、B

D、E是两个并列的分词做修饰成分修饰对象有歧义，即可能修饰local times，也可能修饰整句话的主干意思，其中D使用differed还犯了主动变被动的逻辑上的错误

只有C的主谓一致、修饰对象明确， determined和differing并列