Read the following excerpt from a speech: Fellow employees, I know our sales are down this year.
Perhaps you, like many of us, have been working harder
than ever and feel that you are not gaining any ground. I
assure you that things will improve: sales will improve, the
company will improve, and your skills will improve. And for
those who don't believe me, I ask you this: Is it that you
have no faith in the company, or in yourselves?

Which statement best explains why the final sentence is effective?

A. It appeals to the audience's sense of common purpose.

B. It makes the case for diverse opinions even in a difficult time.

C. It places blame for the problems on one obvious cause.

D. It dismisses the concerns of pessimistic listeners.