SajjadAhmad
The crucial difference
between the capabilities of a consistent market winner with those of other companies may be not in any knowledge area but in the ability to develop new areas of expertise as the market evolves.
A. between the capabilities of a consistent market winner with those of other companies may be not in any knowledge area but
B. between the capabilities of a consistent market winner with those of other companies may be not in any knowledge area but instead
C. between the capabilities of a consistent market winner and those of other companies may be not in any knowledge area but rather
D. a consistent market winner's capabilities have from those of other companies may be not in any knowledge area as
E. of a consistent market winner's capabilities to those of other companies may not be in any knowledge area but
Source: GMAT Free
Official Explanation
Creating a filter: the original sentence is defective in its use of the word "between," which requires the word "and," not "with." So (A) is out.
Applying the filter: choice (B) is out on the same grounds as (A) -- the use of "with." To narrow down the other choices, we'll have to find new defects.
Finding objective defects: choice (C) is not obviously defective, so we can come back to it. (D) and (E) take a different approach to the sentence. (D) is improper English usage; the capabilities of one market winner cannot alone "have" a difference. (E), similarly, uses "of" and "to" rather than the proper "between" and "and."
The correct answer is (C).