The law of diminishing marginal utility states that
a. eventually total utility falls as more of a good is consumed, other things constant.
b. the extra satisfaction from consuming a good increases slowly as more of a good is consumed, other things constant.
c. the extra satisfaction from consuming a good decreases as more of a good is consumed, other things constant.
d. when the extra satisfaction from consuming a good becomes negative, total utility starts falling, other things constant.
