This question presents a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise, choose one of the others.
The professors collaborated with subject matter experts and discovered that 85% of college students working while in school possesses a higher grade point average than those who do not work.