When an economist talks about utility, she is talking about A. a company that provides electricity, water, gas, etc. B. the satisfaction, in terms of price, that a producer receives from selling his product C. the amount of one good that a person is willing to give up in order to get a unit of another good D. the satisfaction that results from the consumption of a good E. the satisfaction that results from the consumption of a good minus the price that must be paid to get the good