贵州-AnEnglishexchangestudentinyourcollegeislearningChinese,butheoftenuses你好whenhespeakstoyourprofessors.Whatdoyouthinkorsay?

['A. Isn’t he funny when he makes silly mistakes?', 'B. I wonder if he knows the professors really well.', 'C. “It’s very rude to use 你好 when you speak to a professor. You should show more respect.”', 'D. “Your Chinese is excellent. By the way, you might like to say 您好 when you speak to your professors.”']