R-12 should be recycled instead of vented to the atmosphere because

a. recycling companies offer large financial incentives.
b. it has been proven to deplete the earth's ozone layer.
c. r-12 is expensive.
d. r-12 is unstable.

Option (B)

Explanation:

R-12 is known as the Dichloro-difluoro-methane and it is a colorless gas. It is was earlier used in the refrigerators, vehicles air conditioning, and aerosol spray. The use of this R-12 was found to be depleting the ozone layer which was not a positive effect on the earth. Due to this, the use of this gas was banned and alternative energy resources were used. Its products containing this R-12 gas were not expensive and they were stable enough.

Hence, the correct answer is option (B).

thats how its supposed to be

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a