Kristen Scrimped and Saved for Over a Year So That

Kristen scrimped and saved for over a year so that she could afford a trip to the Super Bowl if her favourite team won the NFC title.She was excited when her team made it to the Super Bowl; however,the actual game was fairly boring,and in the end,Kristen's favourite team lost.Still,when Kristen got back home,she told all her friends about the great time she had at the game.What is the best explanation for Kristen's attitude about the game

A)  ingratiation theory 
B)  effort justification 
C)  self-serving bias 
D)  matching hypothesis