Which of the following can be concluded from the passage?

A.A greater percentage of women are advancing professionally in the U.S.than before.

B.Professional men refuse to go with women on business trips.

C.Each year there are more women tourists in the United States.

D.Businesswomen become successful by showing a willingness to travel alone.

正确答案：A greater percentage of women are advancing professionally in the U.S.than before.