You should be able to find it in the Table of Content, which is in the very beginning of the book.
Her success and what she is best known for are the main topics of the paragraph. So, Answer A would be your best bet. It covers all of those points.
A verb is an essential part of a sentence structure that is referred also as the action word. In this case, the action word present here is had. The nouns in this sentence are players, guards and injury rate. The subject are the guards since they are the center of the sentence. Answer is had.
B: Until we are able to confirm whether or not the radio waves came from outside of this solar system
