根据描述，你知道小明的爸爸是做什么工作的吗？
—Who's that man, Xiao Ming?
—He is my father.
—Where does he work?
—He works in a car factory.
—What can he do?
—He can make cars.
—What does he do?
—He is a/an __________.

A、

B、

C、