请选择ABC9R0`,~5P7J 你想告诉别人不可以在博物馆高声喧哗，应该说：5]0@9E1O(|9v'n
A. You needn’t talk quietly at the museum.5]0@9E1O(|9v'n
B. You can’t play at the museum.5]0@9E1O(|9v'n
C. You mustn’t talk loudly at the museum.5]0@9E1O(|9v'n