单项选择题

Why does the man mention his friend Brian

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 blushin

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单项选择题

What does the man say about children

A．They blush more readily than women do.
B．They're uncomfortable performing in front of adults.
C．They don't respond to stress well.
D．They blush less frequently than adults do.