最后一题：From the passage we can safely infer that _______ 单选题 A

最后一题：
From the passage we can safely infer that _______

单选题
A. A. it's a matter of life or death if you call someone in day time.
B. B. the meaning of time differs in different parts of the world.
C. C. it makes no difference in the U.S. whether you are early or late for a business party.
D. D. if a person is late for a date, he needn't make some explanation.