单项选择题

Questions 11 to 13 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. Why does the writer cite the lion case

A.To show that lions are always prepared to fight.
B.To show that lions are fierce animals.
C.To show that lions are ready at all times to flight.
D.To show that emotions can motivate thoughts and actions.