题目内容：
根据下列短文，回答题。We lost two superstars in 1977．Neither man’s admirers have been able to understand thesuccees of the other one．And this tells us something of the difference between the generationsthat the two singers represent．
There were similarities between Bing Crosby and Elvis Presley．Both reached fame whileyoung and because very rich．Although neither one had any musical education，both developedtheir own musical styles。which were at first criticized by the Critics and later studied as newforms in the art of popular son9．Both man had successful movie careers despite a total lack ofacting ability．
Both were creations of the microphone．which made it possible for signers with weakvoices to be heard beyond the third row．With Bing the microphone was usually hidden，butElvis brought it to the stage．
The difference between the men reflects the changing values in American life．Crosby’smusic was soothing(令人舒畅的)；Presley's was disturbin9．Crosby was singing to wartimeAmerica．His audiences had all the disturbances they could handle in their private lives．theydid not want to buy more at the record shop and the movie theater．
Crosby’s admirers always said how“relaxed”and“natural”he was．When Presley beganhis career，the whole country had become relaxed and easygoin9．Its young people，who hadno rftemory of troubled times．found it borin9．They were hungry for excitement．Theywelcomed Elvis，who was certainly not the kind of young man their parents would admire．Presley was loud and valgar(粗俗的)-and he was bringing something new and exciting．
It is probably too simple to explain each man in terms of changes in the economic and political situation．Something in the culture was also changing．
Which of the following could be inferred about Crosby and Presley? A．They died in the same year．
B．They became popular in 1977．
C．They influenced each other in music．
D．They represented the postwar generation．
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