Rosa has plans to go to a movie and already has a $10 nonrefundable, nonexchangeable, and nontransferable ticket. Now Nick, whom Rosa has wanted to date for a long time, asks her to a concert. Rosa would prefer to go to the concert with Nick and forgo the movie, but she doesn't want to waste the $10 she spent on the movie ticket. From the perspective of an economist, if Rosa decides to go to the movie, what has she just done? O Correctly ignored a sunk cost Made an optimal choice O Incorrectly allowed a sunk cost to influence her decision