The marginal benefit of a slice of pizza is the:

total amount that a consumer is willing to pay for a whole pizza, divided by the number of slices
difference between the value of the slice to the consumer and the price of the slice.
maximum amount that a consumer is willing to pay for the slice.
price of the slice of pizza

(D)Maximum amount that a consumer is willing to pay for the slice.

Explanation:

Marginal benefit(also referred to as Maximum Utility) in Economics is the maximum amount a consumer is willing to pay for an additional good.

It can also refer to the additional utility/satisfaction that the consumer receives on usage/consumption of the additional good/service.

The marginal benefit of a slice of pizza is the maximum amount that a consumer is willing to pay for the slice of pizza.