Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions.
Now listen to the news
The percentage of cocaine brought through the coast has increased by ______.

A．Teachers are well paid at Deep Springs.
B．Students are mainly from New York State.
C．The length of schooling is two years.
D．Teachers needn’t pay for their rent and meals.

A．To reduce air fares.
B．To streamline airline structures.
C．To readjust their marketing strategy.
D．To pursue marketing alliances.