Beth's friends will take her to the movie Gladiator or the play Rent for her birthday. Beth chooses to attend the play. We know that:
A.
Beth has made an irrational decision.
B.
not seeing Galdiator is Beth's opportunity cost of attending Rent.
C.
Beth did not make a decision at the margin.
D.
seeing Rent did not cost Beth anything since she did not have to pay for the ticket