Answer:
is there just one right answer to this question
<span>D. The student's performances were impressive.
The sentence implies that there is only one student because the apostrophe is before the "s." If we want to say that there were multiple students who had impressive performances, we would say...
The students' performances were impressive.</span>
He kept him in the house and did not often let him go out.
To seperate info, allow writer to provide additional info