Amber Is Having a Discussion with Her Friends About the Best

Amber is having a discussion with her friends about the best musical groups of all time. Although she initially believed that the Rolling Stones were the best group, after listening to her friends' reasons for liking the Beatles she changes her mind and agrees with them. If she now truly believes that the Beatles are the best group, she is demonstrating

A) public conformity.
B) private acceptance.
C) social facilitation.
D) social interference.