On September 1, Candice in Manitoba mailed a letter to Benjamin in St. John's offering to sell 1,000 widgets at $1 per widget. On September 2, Candice mailed another letter revoking the offer stating she was all out of widgets. Benjamin received Candice's offer on September 3 and immediately sent a fax of his acceptance. On September 4, Benjamin received Candice's letter of revocation. Which of the following statements about revocation is correct? An offer cannot be revoked through the mail O A letter of revocation is effective when mailed A letter of revocation is effective when received by the offeree An offer may only be revoked after a reasonable time has elapsed