Marcia Is Unsure About Whether Jan Is Her Best Friend

Marcia is unsure about whether Jan is her best friend.She thinks about how many times she has listened to Jan complain about her boyfriend, helped Jan study for difficult exams, and brought soup to Jan when she was sick.Marcia realizes that she speaks to Jan almost every night.After thinking about all this, Marcia concludes that Jan must be her best friend.This conclusion is based on a process described by

A) self-perception theory.
B) social comparison theory.
C) self-awareness theory.
D) self-discrepancy theory.