单项选择题

Questions 7 to 10 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.
What is the problem that Joan has got

A. It is hard to find a suitable hotel.
B. She has never been abroad.
C. She can’t book tickets for her family now.
D. She has to take her children with her.