Which of these statements necessarily violates the sunk cost principle? a. The engine in my carjust broke down. I decided to scrap the car because the costs for repairing the car exceed the amount I...

Which of these statements necessarily violates the sunk cost principle?

a. The engine in my carjust broke down. I decided to scrap the car because the costs for repairing the car exceed the amount I paid for it.

b. After observing how financial stocks performed last week, I will sell all of my shares of Bank of Amerigo next week.

c. I will buy a $1 book that I would not otherwise want in order to make my online purchase exceed $25. That way, I can save $5 on the shipping fees I would otherwise pay.

d. I would have paid $30 for a ticket if it all went to the venue, but I won't pay it knowing Ticketbuster gets most of the money in fees.