A．To introduce the woman to someone who has researched blushing.
B．To illustrate the benefits of a public speaking class.
C．To give an example of someone who blushes easily.
D．To explain a way to overcome blushing.

A.To
B.
B．To
C.
C．To
D.
D．To

【参考答案】

C
解析：Why does the man mention his friend Brian?