Some Baseball Fans Leave the Game in the Seventh or Eighth

Multiple Choice

Some baseball fans leave the game in the seventh or eighth inning to avoid the postgame traffic. The fans are:

A) not considering that they have already paid for their tickets.
B) making a marginal decision by comparing the cost of leaving early to the benefit of leaving early.
C) thinking only about the benefits of avoiding traffic.
D) underestimating the value of staying for the rest of the game.