Which of the Following Represents a Sex Difference in Communication

Which of the following represents a sex difference in communication?

A) Compared to women, men tend to express more nonverbal communication such as smiling and other facial expressions.
B) Men maintain more eye contact than do women.
C) Women are more polite in tone and are more likely to show interest and concern.
D) Men use more qualifying, tentative statements, which add an element of uncertainty.
E) Men ask a greater number of questions than do women.