The author implies that if Elvis Presley had continued to make personal appearances during the sixties,

(1) the Beatles might not have become so popular
(2)
Presley would have had to change his hair style
(3)
the Beatles would have become even more popular
(4)
it would not have affected the Beatles' popularity
(5)
the Beatles would not have come to America

(1) the Beatles might not have become so popular

(3) the Beatles would have become even more popular
(5) the Beatles would not have come to America