Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
People believe that he and a friend discovered traces of treasure in the hole.
A.It is believed that he and a friend had discovered traces of treasure in the hole.
B.Traces of treasure are believed to have been discovered in the hole by him and a friend.
C.Traces of treasure were believed to have been discovered in the hole by him and a friend.
D.It was believed that he and a friend had discovered traces of treasure in the hole.