Lena Often Expresses Her Anger in Private but Never in Public

Multiple Choice

Lena often expresses her anger in private but never in public. Her husband, Leonard, sometimes expresses his anger in public but would be very embarrassed to be caught crying in public. This example illustrates:

A) culturally determined display rules.
B) innate characteristics of emotional expression.
C) gender differences in blood levels of the hormone estrogen.
D) gender differences in blood levels of the hormone testosterone.