John has a marginal benefit of $7 for 1 slice of pizza, $5 for a second slice, $3 for a third slice, $1 for a fourth slice, and $0.50 for a fifth slice. The price of pizza is $1.50 per slice. Which of the following statements is correct?

A) John will purchase 3 slices of pizza and have consumer surplus of $10.50.
B) John will purchase 4 slices of pizza and have consumer surplus of $12.00.
C) John will purchase 2 slices of pizza and have consumer surplus of $1.50.
D) John will purchase 3 slices of pizza and have consumer surplus of $4.50.
E) John will purchase 2 slices of pizza and have consumer surplus of $3.00.

A