On May 1,2002,Bob Received a Telegram from Ralph Offering to Support

On May 1,2002,Bob received a telegram from Ralph offering to support him in his new construction project.On May 5,2002,at 9:00 AM,Ralph sends Bob a telegram attempting to revoke the offer.At 11:00 AM on the same day,Bob mails Ralph a letter attempting to accept the offer.At 11:30 AM,Bob receives Ralph's revocation.Assume Bob and Ralph are both construction contractors and the custom in the construction business is to offer by telegram and accept by mail.Which of the following statements holds true in this situation?

A) Ralph's revocation can make changes to the contract,though it reaches Bob after he sends the acceptance mail.
B) Bob's acceptance would be effective only when Ralph reads the acceptance,which would then create the contract.
C) the parties would have a contract because Bob used the means of communication impliedly authorized by trade usage.
D) the parties would not have a contract as Bob used a nonauthorized means of communicating his acceptance.