Sentence Correction

22. 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 after some discussion.

IMO C, use of between shows that the time duration is between two successive passes. Not sure though

B !

B !

C

The sentence means that comet changes its orbit slightly during the period between its passes close to earth - that period is 76years.

OA C

whats wrong with E?

C. Between should be used for two and here we are talking about two passes. "Interval between" is correct idiom. E.g. We had an interval between two sessions.