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 best, choose the first answer; otherwise choose one of the others.

Widely acknowledged as one of the most important creations, Alan Turing made possible the development of modern computer through his formalization of an algorithm considered vital for the process.

Alan Turing made possible the development of modern computer through his formalization of an algorithm considered vital for the process

Alan Turing's formalization of an algorithm considered vital for the process, made possible the development of modern computer

Alan Turing formalized an algorithm that made possible the development of modern computer

modern computer was developed by Alan Turing's algorithm that was considered vital for the process

Alan Turing's algorithm made possible the development of modern computer through its formalization, considered vital to the process