what helps a consumer determine the quantity of something to buy?\n○ marginal cost\n○ marginal error\n○…

Brief Explanations:

In economics, consumers make decisions based on marginal analysis. Marginal benefit is the additional satisfaction a consumer gets from consuming one more unit of a good or service. Consumers compare marginal benefits and marginal costs. They will keep consuming more as long as the marginal benefit exceeds the marginal cost. So, marginal benefit helps determine quantity to buy.

Answer:

C. marginal benefit