Susan Agrees to Buy Jan's Car for $4,000

Susan agrees to buy Jan's car for $4,000. Susan is to bring the money the next day. That night Jan wrecks the car. Susan:

A) must give $4,000 for the car and can collect the insurance money, if there is any
B) must give $4,000 for the car but Jan must be allowed time to get the car repaired
C) must buy the car, but can pay less than $4,000 since the car is now worth a lot less
D) does not have to buy the car
E) none of the other choices