单项选择题

In this section, you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
Questions 1 to 4 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 woman buys all of the following books EXCEPT ______.

A. an English writing textbook
B. a math textbook
C. a novel
D. a book about marriage