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The growth of the railroads led to the abolition of local

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Director
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The growth of the railroads led to the abolition of local [#permalink] New post 23 Jul 2004, 10:53
00:00
A
B
C
D
E

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(N/A)

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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


Questions:

How do you know when to use "which was" and when not to use it?
SVP
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 [#permalink] New post 23 Jul 2004, 11:18
B?

this non-restrictive clause can be removed. It just describes local time.

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 which differed from city to city, and to the establishment of regional times.
Director
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 [#permalink] New post 23 Jul 2004, 13:05
there are 3 parts of this sentence:

1)The growth of the railroads led to the abolition of local times,
2)which was determined by when the sun reached the observer’s meridian and differing from city to city,
3)and to the establishment of regional times.

if you use "which" (2nd), then "and" (3rd) would refer to local times. 2nd is the parenthetical/appositive element to the first, it just adds to already provided information (local times). Even if you remove 2nd, it doesn't harm the structure of the sentence.

"...to the abolition of local times and to the establishment..."

E should be the answer.
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 [#permalink] New post 24 Jul 2004, 09:03
Excellent explanations here:

http://www.gmatclub.com/phpbb/viewtopic ... +differing

Answer is E
  [#permalink] 24 Jul 2004, 09:03
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