Which of the Following Is an Assumption of Social Identity

Which of the following is an assumption of Social Identity Theory?

A) Discrimination against outgroups is the most important way that ingroups maintain their positive identity.
B) Ingroup members evaluate their own groups through social comparison with relevant outgroups.
C) Individual self-esteem is unrelated to group self-esteem.
D) Ingroup members evaluate their own groups by carefully evaluating individual group members.