12. CFCs are used as refrigerants in refrigerators. The use of CFCs has been banned worldwide. Do you agree with the government's idea of not using CFCs anymore? Why or why not?

A. Yes, because CFCs are dangerous to human health.
C. Yes, because CFCs causes global warming.
B. No, because there is no study that supports the idea.
D. No, because CFCs play a vital role in refrigerator​