Everyone Refers to Jerry as "Big Guy

Everyone refers to Jerry as "Big Guy." He is 6'4" tall and weighs 275 pounds (he says) . It's probably closer to 300 pounds. Jerry loves hamburgers. He ate 4 of them at McDonald's one evening. He figured the last one was just worth the $1 price he paid. If his demand curve for hamburgers is downward sloping, then he

A) gained no consumer surplus because his demand curve is downward sloping
B) would have gained consumer surplus if he had eaten one more hamburger
C) gained consumer surplus on each of the four he consumed
D) gained consumer surplus only on the first three hamburgers
E) gained $1 consumer surplus on the fourth hamburger alone