If Bella Eats One Piece of Pie,she Gains a Utility

Multiple Choice

If Bella eats one piece of pie,she gains a utility of 10.If she continues,a second piece yields a marginal utility of 8,a third will bring marginal utility of 2,and a fourth piece of pie will yield a marginal utility of -2.We can say:

A) Bella's total utility from eating four pieces of pie would be 22.
B) Bella's total utility will decrease if she eats the third piece of pie.
C) Bella's total utility will be maximized if she eats three pieces.
D) Bella's total utility decreases after the first piece of pie.