How Does Gender Schema Theory Explain Why Stereotypes About Homosexuals,heterosexuals,males,females,sexual

How does gender schema theory explain why stereotypes about homosexuals,heterosexuals,males,females,sexual behaviour,etc.,are very slow to change?

A) we remember events and people in ways that fit better with our stereotypes
B) we learn what to expect of people by observing what they do
C) we learn to expect certain things from certain people and situations
D) we tend to give the same meaning to people across different contexts