When does a producer surplus occur? a. when individuals pay less than the maximum amount they would have been willing to pay for a good or service b. when producers sell a product for the exact...

When does a producer surplus occur? a. when individuals pay less than the maximum amount they would have been willing to pay for a good or service b. when producers sell a product for the exact minimum amount they would be willing to accept c. when producers sell a product for less than the minimum amount they would be willing to accept d. when producers sell a product for more than the minimum amount they would be willing to accept