Answer:
B. deindividuation
Step-by-step explanation:
deindividuation refers to a situation when people lose their self-identity when they are in the middle of a certain crowd.
Often times, when individuals gather with a crowd, the value that the individual held can be different with the value/principles that are held by the crowd. Because of this, the individual tend to feel the pressure to conform with the crowd's value in order to feel accepted. This is why the deindividuation occurs.