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.

How will the club members work to clean up the area

A.They will work alone.
B.They will work in pairs.
C.They will work in two 10-person teams.
D.They will work in two 15-person teams.