The author says that he played
albums in the store and it led increase in sales but he talks about playing a singer's
singles songs to increase the sales.
(A) Pop music is similar to rock music.
Not an assumption, to increase the sale of Frenchie Pear's new CD, the author doesn't have to assume that pop music is similar to rock music.
(B) All of Frenchie Pear's previous singles that were played in Power Records stores sold well.
Not an assumption, the author doesn't have to assume that
ALL Frenchie Pear's previous singles that were played sold well, even if some singles were played, then the conclusion can still hold.
(C) The said sales technique also works for specific songs.
Assumption, the author jumps from
album in his support to
singles (specific songs) in his conclusion so he has to assume that the technique mentioned also works for specific songs.
(D) Frenchie Pear's latest single has received rave reviews.
Not an assumption, it doesn't matter, even if reviews are rave, the increase in sales can still happen by playing in stores.
(E) Power Records sells more pop albums than any other music chain store does.
Not an assumption, the comparison between pop albums sold by Power Records and other music chain stores is irrelevant.
(C) is the answer.