On July 1, Mr

On July 1, Mr. Burns makes an oral offer to sell used well piping to a steel mill for recycling into new steel. On July 15, the steel mill mailed Mr. Burns its acceptance. However, on July 17, before the acceptance reaches him, Mr. Burns revokes the offer by faxing his revocation to the mill. The acceptance arrives on July 20. Is there a contract?

A) No, because Mr. Burns revoked his offer before he learned of the mill's acceptance.
B) No, because the acceptance has to be in the same media as the offer.
C) Yes, because oral offers must remain open for 10 days.
D) Yes, the mill's acceptance is effective at the time of dispatch.