单选题 In lines 11 - 12, the phrase "radically different form" refers to

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