Correct Answer: B

Explanation:

Ozone depleting substances include:

1. chlorofluorocarbons (CFCs)
2. hydrochlorofluorocarbons (HCFCs)
3. hydrobromoflurocarbons (HBFCs)
4. halons
5. methyl bromide
6. carbon tetrachloride
7. methyl chloroform.

They have been used as:

1. refrigerants in commercial, home and vehicle air conditioners and refrigerators
2. foam blowing agents
3. components in electrical equipment
4. industrial solvents
5. solvents for cleaning (including dry cleaning)
6. aerosol spray propellants
7. fumigants.