On May 1 Ralph Offers to Cure and Smoke Sam's

Multiple Choice

On May 1 Ralph offers to cure and smoke Sam's pork. On May 3 Ralph mails Sam a letter revoking the offer. Sam receives the letter on May 5 and responds on May 6. Ralph's revocation of the offer

A) ​became effective on May 1.
B) ​became effective on May 3.
C) ​became effective on May 5.
D) ​did not become effective because Sam responded to the offer.