The growth of the railroads led to the abolition of local times, which

Dear Friends,

Choice A: This answer choice features a subject-verb disagreement between the verb "was" and the noun "local times". This answer choice also fails to maintain parallelism between the phrases "which was determined..." and "differing from city to city". Remember, all elements within a list must be parallel. Thus, this answer choice is incorrect.

Choice B: This answer choice repeats the subject-verb disagreement seen in Option A. Thus, this answer choice is incorrect.

Choice C: This answer choice repeats the parallelism error found in Option A. Thus, this answer choice is incorrect.

Choice D: This answer choice fails to maintain parallelism between the phrases “determined by when the sun reached the observer's meridian” and "differed from city to city", as the former is a "verb+ed" modifier phrase and the latter is a verb phrase. Thus, this answer choice is incorrect.

Choice E: This answer choice maintains proper subject-verb agreement and parallelism; the phrase "determined by when..." and "differing from city to city" are verb-based modifying phrases that act upon the noun "local time", making them parallel. Thus, this answer choice is correct.

Hence, E is the best answer choice.

All the best!
Experts' Global Team