Samantha is at a friend's house for dinner. Her friend says "I can re-heat either the lasagna or the fried rice." Samantha likes them both, but chooses the fried rice. Does Samantha's choice entail a cost?

A) No—as long as her friend didn't charge Samantha for the meal.
B) Yes—Samantha sacrificed the opportunity to eat lasagna.
C) Yes—as long as Samantha reimburses her friend for the cost of re-heating the meal.
D) Both A and C above.

B