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.
A recent study on the impact of standardized tests on student achievement, which was conducted over a period of four consecutive years, was probably released to keep from not imposing on impending legislation.