Which of the following is an example of falling into the sunk cost trap? a. I need to think about how much I paid for the house five years ago, since that affects the taxes I need to pay when I sell...

Which of the following is an example of falling into the sunk cost trap?

a. I need to think about how much I paid for the house five years ago, since that affects the taxes I need to pay when I sell it.

b. Let's do some research on the past performance of this company before we invest in it.

c. I bought this for $ 15; therefore I shouldn't accept to sell it for anything less than $ 15.

d. All of the above.