Detailed Answer
(b) Under the mailbox rule, an acceptance is ordinarily
effective when sent if transmitted by the means authorized by the
offeror, or by the same means used to transmit the offer if no
means was authorized. However, the offeror may stipulate that
acceptance is effective only when received by the offeror. In this
situation, no contract was formed because Moss’ acceptance was
not received by the date specified in Fine’s offer. Under common
law, a method of acceptance other than the means specified in
the offer or the method used to communicate the offer, is considered
effective when received by the offeror.