Willy is a middle-aged man with a huge beer belly, but it is said that he _____ actually a famous athlete in his youth.
(A)has been
(B)is
(C)was
(D)had been

威利是一個中年男子，但它是一個巨大的啤酒肚說，他實際上是一個著名的運動員，在他的青年時期。