toughest SC..Fully confused !!!

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toughest SC..Fully confused !!!

by bzg2hg » Wed May 27, 2009 7:37 am
Because Halley’s comet changes orbit slightly during the seventy-six-year interval between passing close to Earth, it may veer onto a collision course with a planet sometime in the distant future.

(A) between passing
(B) of passing
(C) between its passes
(D) of its passes
(E) as it passes

OA is C
Please explain .....

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IMO

by kc_raj » Wed May 27, 2009 7:50 am
IMO C

A "it" has no clear antecedent may refer to orbit or Halleys comet
B same as A issue
D interval of its passes does not make sense. it should be between
E interval as it passes does not make sense

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