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.
There is only one verb in this sentence, and that is the word <em>had, </em>which means that it has to be the main verb, or the correct answer in the example above. Verbs are words used to show an action that the subject is performing or a state that the subject is undergoing. In the sentence above, we can see the <em>state </em>of the subject <em>guards </em>- they were injured most.
