The correct answer is C.
Step-by-step explanation:
A) Sana is listening quietly, and her mind wanders off. This is a bad way to actually learn, if you listen quietly the chances of you knowing what's going on in the story is low. Then if she's wanders of she won't know the important infromation she need's to know. That being said, Sana is not the best listener.
B) Ali agrees with whatever the other person says, and he never offers any suggestions. Ali isn't paying any attention to what he need's to look for, he is just simply agreeing to everyone else. That means he isn't learning anything because, he isn't trying. That being said, Ali is not the best listener.
C) Mina listens without interrupting the person, and she gives appropriate suggestions. Mina listens, and she doesn't make a sound when someone else is reading. When the person that was reading stop's, she gives suggestions. That being said, Mina is the best listener.