In the 1960s pop music underwent a revolution when _______ became world famous and turned their home town of Liverpool into a place of pilgrimage.

A．eliminating the disputes that existed among those colonists who supported the rebel cause
B．drawing upper, as opposed to lower, socioeconomic classes away from the rebel cause
C．tolerating the kinds of socioeconomic discontent that were not allowed to exist on the rebel side
D．absorbing members of socioeconomic groups on the rebel side who felt themselves in contention with members of other socioeconomic groups

A．These conflicts were instigated by eastern interests against western settlers.
B．These conflicts were the most serious kind of confliet in America.
C．These conflicts eventually led to openly expressed class antagonism.
D．These conflicts contained an element of class hostility.