What Is Meant by the 'Bandwagon Effect

What is meant by the 'bandwagon effect'?

A) the phenomenon whereby minorities become majorities
B) the phenomenon whereby a behaviour or opinion that everyone shares loses status because of its commonality
C) the phenomenon that individuals tend to agree with the perceived opinion of the majority
D) the phenomenon that people attempt to maintain their individuality by taking a stand on issues that they perceive to be different from that of the majority of people
E) the hearing impairment that occurs if a parade passes too closely to your living room