The concept based on the assumption that we get bargains on each unit we purchase until the last one is called

A) total utility.
B) consumer surplus.
C) marginal utility.
D) the law of diminishing marginal utility.

Diminishing Marginal Utility

Declining utility, or satisfaction, derived from each additional unit consumed of a particular good or service.

Consumer Surplus

The variance between the total price consumers are inclined and financially capable of paying for a good or service and the amount they actually dispense.