Bill Is Restoring a Car and Has Already Spent $4000

Multiple Choice

Bill is restoring a car and has already spent $4000 on the restoration.He expects to be able to sell the car for $6200.Bill discovers that he needs to do an additional $2400 of work to make the car worth $6200 to potential buyers.He could also sell the car now,without completing the additional work,for $3800.What should he do?

A) He should sell the car now for $3800.
B) He should keep the car since it wouldn't be rational to spend $6400 restoring a car and then sell it for only $6200.
C) He should complete the additional work and sell the car for $6200.
D) It does not matter if Bill sells the car now or completes the work and then sells it at the higher price because the outcome will be the same either way.