Susie Purchased a Nonrefundable Ticket to a Soccer Match for $20

Multiple Choice

Susie purchased a nonrefundable ticket to a soccer match for $20. It will cost her $10 worth of gas and wear and tear to drive to the match and $5 to park her car. On the day of the match, Susie's boss offers her $100 to come to work instead. In considering what to do, which of the above would be considered a sunk cost?

A) The $20 ticket to the match.
B) The $10 cost to drive to the match.
C) The $5 cost to park at the stadium.
D) The $100 offered by Susie's boss.