Monika Will Choose to Eat a Seventh Pizza Slice If

Monika will choose to eat a seventh pizza slice if

A) the marginal benefit from the seventh slice is greater than its marginal cost.
B) the marginal benefit from the seventh slice is less than its marginal cost.
C) the total benefit from all seven slices is less than their total cost.
D) the total benefit from all seven slices is greater than their total cost.
E) she has enough money to pay for it.