Which choice is NOT a sentence? A. Without any choice, the task force began its work. B. Without any other choice, the task force acted. C. The task force, without any choice, made a decision. D. The task force, without any choice but to begin its work quickly.

The choice that is NOT a sentence is:

D. The task force, without any choice but to begin its work quickly.

Explanation:

A sentence is a word or a group of words that expresses a complete thought. A sentence may be formed of one or more clauses, depending on the complexity of the structure and thought being expressed.

If you read the options out loud, you will notice that letter D sounds a bit odd:

D. The task force, without any choice but to begin its work quickly.

The thought being expressed is incomplete. We can sense there is information missing. The task force did what? We do not know. We know it had no choice but to begin its work quickly, but what did they do? To transform it into a sentence, we could either change parts of it or add some more information. Take a look at the examples below:

The task force had no choice but to begin its work quickly.

The task force, without any choice but to begin its work quickly, communicated their decision to act to the committee.

Now we have sentences, since both express complete thoughts. We can thoroughly understand them, without the feeling that there is something missing.