We are working on a new set of Verbal Tests for GMAT Club.

We are working on a new set of Verbal Tests for GMAT Club. Several members have responded to our "Help Wanted Ad" and submitted their questions. I am posting the first batch and would love to hear your feedback about the questions. I would also like to know your opinion about how close this question is to the Real GMAT (or Official Guide if you have not taken the GMAT yet) on a 1-5 scale where
1 is not close at all
2 is not close
3 is average/undecided
4 is close
5 is exact match

I will post the OA and Explanation in 1-3 days, depending on how many takers we get. Your feedback will help significantly and very much appreciated!


By the end of 2008, 180 countries had signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which forbids all nuclear explosions, including the explosive testing of nuclear weapons.
A. 180 countries had signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which forbids all nuclear explosions,
B. 180 countries signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT), forbidding all nuclear explosions,
C. the Comprehensive Nuclear-Test-Ban Treaty (CTBT) was signed by 180 countries, which forbid all nuclear explosions,
D. the Comprehensive Nuclear-Test-Ban Treaty (CTBT) had been signed by 180 countries that forbid all nuclear explosions,
E. the Comprehensive Nuclear-Test-Ban Treaty (CTBT) was signed by 180 countries, forbidding all nuclear explosions,

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