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By 1999, astronomers had discovered 17 nearby stars that are orbited

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Re: By 1999, astronomers had discovered 17 nearby stars that are orbited  [#permalink]

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New post 17 Nov 2018, 01:52
(C) By 1999, astronomers had discovered 17 nearby stars with planets orbiting them that were..."them that" is wrong.
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Re: By 1999, astronomers had discovered 17 nearby stars that are orbited  [#permalink]

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New post 17 Nov 2018, 01:54
(B) By 1999, astronomers had discovered 17 nearby stars with planets orbiting them that were..."them that" is wrong.
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Re: By 1999, astronomers had discovered 17 nearby stars that are orbited  [#permalink]

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New post 24 Nov 2018, 02:59
The question is pretty straight forward.

By 1999, astronomers had discovered 17 nearby stars that are orbited by planets about the size of Jupiter

(A) had discovered 17 nearby stars that are orbited by planets

(B) had discovered 17 nearby stars with planets orbiting them that were

(C) had discovered that there were 17 nearby stars that were orbited by planets

(D) have discovered 17 nearby stars with planets orbiting them that are

(E) have discovered that 17 nearby stars are orbited by planets



By 1999 - indicates something which has already finished by 1999, so there is an absolute necessity for "had" and not have.

This idea renders D, E useless. So the split is A,B,C and D,E. D,E are useless now. Among A,B, and C - all other sentences change the meaning except for A.
Sentence B suggests "that were the size of the jupiter", meaning now it is not the size of the jupiter.
Sentence C suggests "were orbited", meaning now it is not orbiting.
Hence Option A rightly wins the race.
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Re: By 1999, astronomers had discovered 17 nearby stars that are orbited &nbs [#permalink] 24 Nov 2018, 02:59

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By 1999, astronomers had discovered 17 nearby stars that are orbited

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