Erikah Has Just Arrived at the Funeral of Her Friend's

Erikah has just arrived at the funeral of her friend's father. Even though Erikah is usually very outspoken and jovial, she keeps her voice down, expresses her sympathy to the family members, and sits quietly and respectfully during the religious service. Erikah is following the ________ of how to behave in this particular situation.

A) social role
B) social norm
C) script
D) heuristic