单项选择题

Questions 14 to 16 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.

Which is NOT the possible function of keeping pet

A.Lowering a person’s blood pressure.
B.Preparing a young couple for the responsibilities of parenthood.
C.Encouraging social relationships.
D.Indicating the owner’s social status and wealth.