Marco went to Buffalo Wild Wings to watch a football game. Chicken wings there cost $0.75 each. Marco bought and ate 20 chicken wings. Afterwards, he regretted his decision and decided that next time he would buy fewer chicken wings. This means that
A) Marco’s marginal benefit from the 20th chicken wing was zero
B) Marco’s marginal benefit from the 20th chicken wing was negative
C) Marco’s marginal benefit from the 20th chicken wing was less than $0.75