单项选择题

Questions 4 to 6 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 does the man think of fast food

A.It doesn’t taste as good as one’s own cooked foods.
B.It is convenient but one has to stand up eating.
C.It doesn’t contain enough vegetables.
D.It has more protein than neede