Answer:
The correct answer is option C,
chlorofluorocarbons (CFCs
Explanation:
The chlorofluorocarbons (CFCs) were being used in air conditioners, aerosol spray cans, and industrial cleaning products since 1960s. These CFCs are inflammable, but once they are into atmosphere they move to the upper stratosphere and there they enter into a never ending chain reaction thereby releasing chlorine . The free chlorine react with ozone and destroy its molecule.