Vince Buys Tickets to a Concert That His Girlfriend,Jennifer,wants to See.The

Vince buys tickets to a concert that his girlfriend,Jennifer,wants to see.The concert is in three months,but two______________weeks before the show,the couple split up.Vince decides to go to the concert anyway even though he doesn't really like the band."I paid the money,so I might as well go," he says.Vince's decision demonstrates the______________principle.

A) base rate
B) endowment
C) escalation
D) sunk cost