【題組】156.A group of university students led by a professor would like to hold a class discussion about Bill Willox’s works exclusively. Which of the following is most likely to be true?
(A) They must reserve tickets prior to their visit to Forever Great Art Museum.
(B) They can enjoy free admission only if they show their membership card at the gate of the museum.
(C) They can not hold the class discussion on weekends.
(D) Unless they make a payment by credit card in advance, they will not be able to enjoy a guided tour.