问题详情

Why does the author sometimes think some Chinese are impolite and inconsiderate？
A．Because those Chinese are inclined to treat him rudely and drive him back to U. S.
B．Because the author is an unfriendly person and he is very strict with his students.
C．Because their relationship is teacher and student, and they are usually hostile to each other.
D．Because they have different cultural backgrounds and have misunderstood each other.请帮忙给出正确答案和分析，谢谢！