Which Statement BEST Describes the Principle of Diminishing Marginal Utility

Multiple Choice

Which statement BEST describes the principle of diminishing marginal utility? As an individual consumes more of a good:

A) the total utility obtained will eventually fall.
B) the total utility obtained will eventually become negative.
C) the addition to total utility obtained from the nth unit of the good will be less than that obtained from the immediately preceding unit of the good.
D) the marginal utility will eventually become negative.