GMAT Sentence Correction (SC) | Re: #Top150 SC: Since 1966, roughly 21 percent of those enlisted in the

Since 1966, roughly 21 percent of those enlisted in the USMC had reached an E-5 ranking in fewer than three years.

A. had reached an E-5 ranking in fewer than three years

B. have reached an E-5 ranking in less than three years

C. have reached an E-5 ranking in under three years

D. had reached an E-5 ranking in less than three years

E. have reached an E-5 ranking in fewer than three years