The answer is B.) prisoners.
The students are experiencing difficulty in grammar. Grammar
is being defined as the structure of the language or the language’s whole
system by which it is taken in a manner of having to contain morphology and as
well as syntax and it also sometimes include semantics and phonology.
Just as other peoples' feelings can affect the message they're trying to send, your own feelings can get in the way of your communication as well. When you feel a strong emotion or feeling, pay attention to that emotion and try not to let it get in the way of your message