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.

What are the officials trying to do at the moment

A.To restore the normal production of the oil wells.
B.To estimate the losses caused by the fires.
C.To remove the oil left in the desert.
D.To use the oil left in the oil lakes.