【单选题】

In lines 11 - 12, the phrase "radically different form" refers to
A．(A) pop music in relation to non-pop music in the Caribbean

B．(B) music different from that which Adorno had previously considered
C．(C) a style of popular music that did not exist in the United States
D．(D) music which was outside the control of mass communication
E．(E) the influence of rock 'n' roll, or lack thereof, on Calypso