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. Which of the following is NOT the result of a tornado

A.Insects are unable to balance themselves.
B.It is difficult to breathe.
C.A tornado destroys everything on its path.
D.A tornado kills 120 people every time it comes.