Brian Gets 18,23,and 25 Units Worth of Total Utility from Consuming

Brian gets 18,23,and 25 units worth of total utility from consuming 10,11,and 12 raw oysters,respectively,and the price per oyster is 25 cents.Thus,one can infer that Brian

A) is maximizing utility.
B) is not maximizing utility.
C) is experiencing diminishing marginal utility.
D) should consume more oysters.
E) has consumed too many oysters.