According to a 1996 survey by the National Association of College and University Business Officers, more than three times as many independent institutions of higher education charge tuition and fees of under $8,000 a year than those that charge over $16,000. than those that charge

The options omitted are:

A. as those that charge

B. as a charge

C. as to charge

D. as charge

E. as those charging

Correct answer is Option "D" which is "as charge"

Explanation:

In this Sentence Correction question, we need to follow parallelism rules to get the correct answer.

The phrase "as many" in the question must be followed by "as"; and this appears in all 5 answer options, so it's not much help. However, the first "as" is partnered with "charge" ("as many independent institutions of higher education charge"), the second "as" definitely needs it too.

The only answer that follows this pattern is option D