Sentence Improvement

Directions: This question presents a sentence, all or part 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 the best, choose the first answer; otherwise choose any one of the others.

The optimist contended that since men cannot foresee the future, worry about the future is futile, and that every thing, is inevitably for the best.