People Who Received Half-Off Coupons at a Pizza Buffet Ate

People who received half-off coupons at a pizza buffet ate less than average.What conclusion did the researchers draw?

A) People who eat a less expensive meal eat more rapidly.​
B) ​People assume that less expensive food is less tasty.
C) ​People's appetite depends on hormones more than it does on taste.
D) ​People try to eat until they get their money's worth.