According to the law of diminishing marginal utility:
选项：

A:as you consume less of something, your marginal utility from consuming that good will increase.;
B:you should never consume more of something if your marginal utility is decreasing.;
C:if your total utility is increasing as you consume more of something, then your marginal utility must be increasing as well.;
D:as you consume less of something, your total utility will decrease.