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 13 is an unlucky number.
A. It was believed that 13 was an unlucky number.
B. 13 is believed to be an unlucky number.
C. 13 is believed to have been an unlucky number.
D. It is believed that 13 has been an unlucky number.