Refer to Figure 6.10. Kyle would increase his consumption of turkey sandwiches from 5 to 7 per week if their price fell from $8 to $6. This illustrates the idea of

A) consumer surplus.
B) the law of diminishing marginal utility.
C) cross-price elasticity of demand.
D) technical efficiency.

Consumer Surplus

The difference between the total amount that consumers are willing and able to pay for a good or service and the total amount that they actually do pay.

Law of Diminishing Marginal Utility

The principle that as a person consumes more of a product, the satisfaction (utility) gained from consuming each additional unit decreases.