Even though she thought it was silly, Emily wore pink and green ribbons in her hair as her friends did. This is an example of:

A) a group role.
B) a group norm.
C) conformity.
D) obedience.

Group Norms

The unwritten and often unspoken set of informal rules that govern individual behaviors in a group, which members are expected to follow.

Conformity

The adjustment of one's behavior or beliefs to match those of others, typically as a response to real or imagined group pressure.