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 can be learned about the meeting from the conversation

A.The meeting was held in Japan.
B.The meeting was successful on the whole.
C.The meeting lasted for a week.
D.The meeting didn’t go smoothly.