【单选题】

Questions 8 to 10 are based on the following conversation.At the end of the conversation, you will be given 15 seconds to answer the questions.

Now, listen to the conversation.
What is the disadvantage of the old sitcomsA．They are out of date.
B．They are only shown on Sunday.
C．They are on very late at night.
D．They have too many ads.