Pat's Total Utility After Eating 100 Reese's Peanut Butter Cups

Multiple Choice

Pat's total utility after eating 100 Reese's Peanut Butter Cups was less than his total utility after eating his ninety-ninth.Therefore,Pat's marginal utility for the 100^th peanut butter cup was

A) positive,but less than one.
B) positive,but less than Pat's marginal utility for the 99^th peanut butter cup.
C) zero.
D) negative.