Instead of Studying for an Additional Two Hours for the Economics

Instead of studying for an additional two hours for the economics final exam,Leanne decides to watch a movie.Leanne is making

A) a rational decision if her marginal cost from the movie is greater than her marginal benefit.
B) a decision that does not involve an opportunity cost.
C) a rational decision if her marginal benefit from the movie is greater than her marginal cost.
D) an irrational decision because studying is more important than watching a movie.
E) a decision that is not on the margin because she will see the entire movie.