单项选择题
Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.
What is the speaker’s last advice()
A.To take a few self-defense classes.
B.To stick to well-lit streets at night.
C.To avoid walking alone at night.
D.To stay with their friends.