Elijah is restoring a car and has already spent $1,000 on the restoration. He expects to be able to sell the car for $15,800. Elijah discovers that he needs to do an additional $2,400 of work to make the car worth $15,800 to potential buyers. He could sell the car now, without completing the extra work, for $11,600. What should he do?

a. It does not matter which action he takes since the outcome will be the same either way.

b. He should sell the car now for $11,600.

c. He should keep the car since it wouldn't be rational to spend $3,400 restoring a car and then sell it for only $15,800.

d. He should complete the additional work and sell the car for $15,800.