Supply is the total amount of a that is available to consumers. A) good or device B) good or service C) product or warranty D) service or industry

B

Explanation:

I think you've already figured this out for yourself, but I thought I'd answer anyway and maybe clarify some things.

Supply is the total amount of a good or service that is available to consumers.

Think about it: goods are physical things bought and sold, like apples. Services are actions done for another person, like taxi driving or renting a used car.None of the other answers make sense: a "device" is not a strictly defined term in economics; an "industry" can't be available to consumers, and a "warranty" isn't applicable.