the concept of diminishing marginal utility: select one: a. explains why individuals rarely maximize their total utility. b. is the change in total utility that comes from consuming one additional unit of a good or service. c. is the principle that the additional utility gained from consuming successive units of a good or service tends to be smaller than the utility gained from the previous unit. d. is the principle that the additional utility gained from consuming different bundles of goods and services tend to be smaller than the utility gained from consuming just one bundle of goods and services.