Diminishing marginal utility:a. occurs when a consumer buys more of a good as a result of a relative price change.b. occurs when the additional utility for each good declines as consumption increases.c. occurs when there is a change in purchasing power as a result of a change in the price of a good.d. is the additional satisfaction derived from consuming one more unit of a good or service.e. is the combination of goods and services that maximizes utility for a given income.