First Read: Comprehension
Identify the choice that best answers the question.
In "Flowers for Algemon," why do the doctors use Charlie in their experiment?

A. They see that he has bonded with Algernon.

B. They believe that he is motivated to try to learn.

C. They know that he can get a better job if his skills improve.

D. They realize that he is the only person who is willing to participate