Singers Sing a Great Song That Shoots to the Top

singers sing a great song that shoots to the top of the charts.The singers then go on tour and have sold-out concerts everywhere they appear.Just as quickly (particularly if they are unable to follow their first hit song with a second one) ,they are singing in half-filled concert halls,then smaller clubs,and eventually no one wants to hear them perform.Such "one-hit wonder" singers are best categorized as being __________ products (or services) .

A) fad
B) low-learning
C) fashion
D) generalized
E) high-learning