Suppose that at Miles's current level of consumption, his marginal utility from a pizza is 10 utils, and his marginal utility from a pint of ice cream is 16 utils. If the price of a pizza is $8, and the price of a pint of ice cream is $5, is Miles maximizing his utility?
选项：

A:Yes. He should not change his spending on frozen pizza and ice cream.;
B:No. He should shift his spending away from ice cream and towards frozen pizza.;
C:No. He should shift his spending away from frozen pizza and towards ice cream.;
D:No. He should buy less frozen pizza and less ice cream.