The Chicago Cubs Major-League Baseball Team Is in the Playoffs

The Chicago Cubs major-league baseball team is in the playoffs and doing well. Behind the left-field wall there is an apartment building, and the owner advertises, "Space available on the apartment building roof with a clear view of the field for the World Series. Bring a lawn chair, your radio, and a cooler and enjoy the game. Just $50 per game." Bart, a lifelong fan, answers the ad and pays the building owner $100 to reserve space for the first two games. Unfortunately, the Cubs start playing poorly and don't make it to the World Series.

A) The building owner does not have to refund the money because Bart reserved space and the space is still there for him to use whether the games are played or not.
B) The building owner does not have to refund the money because it's not her fault that the Cubs didn't make it to the World Series.
C) Bart will get a refund because of impracticability.
D) Bart will get a refund because of frustration of purpose.