单项选择题

Questions 5 to 8 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now, listen to the conversation.

The background music as mentioned in the conversation is ______.

A.such music as is played in concerts
B.the music that is played only in restaurants and stores
C.the music that is played to promote production
D.music played in the background to put you in a particular mood