The passage suggests that an assumption underlying Connerton's theory of dance and social memory is that

A． the automatic nature of dance tends to restrict the extent to which dances can be "read"
B． the value and effectiveness of dance performance lies in transmitting social memory through unconscious means
C． the legitimization of most social orders stems from social memory transmitted through dance
D． folklore and community history are the principal narratives dance is capable of expressing
E． social structures would most likely be more conservative if dance did not transmit social memory