Johnny Offers to Sell His Car to Kyle for $70

Johnny offers to sell his car to Kyle for $70 000 and says that the offer is open for 5 days.Three days later Johnny tells Kyle that he has sold the car to Manny for $80 000.Which of the following is an option available to Kyle?

A) Kyle can sue Johnny for breach of contract.
B) Kyle cannot do anything because Johnny was entitled to revoke his offer.
C) Kyle can sue Manny and recover the car.
D) Kyle can claim the $10 000 from Johnny.