A. To do whatever he wants them to do.
A sentence fragment is a sentence that is incomplete, one that is separated from the main claus. In this case "To" is a preposition, which means that there should be more to the sentence. You can tell because you can't fully understand the idea behind the sentence. Therefore A, is the fragment.
Most likely to try and validate his point of more and provide some background evidence/support to the speeches/conversations.
Answer:
It gives a description.
Explanation:
The three sentences are about a rover. By providing the detail on what it does, it is describing the rover to you.