John has a lending company. In his letter mailed on September $15,$ he offered to sell his business to Peter for $$20,000\mathrm{.}00.$ The letter was received by Peter on September $20.$ On September $25,$ Peter sent his letter of acceptance in which John received on September $28.$ However, on September $23,$ John had decided to withdraw and mailed a letter to Peter revoking it$.$ The letter was not received until September $29.$ Is there a binding contract between John and Peter?$$A$.$ Yes, the ordinary rule which the courts have adopted is that acceptance is complete when a proper addressed and stamped letter of acceptance is dropped in the mail.$5$B$.$ No$,$ John revoked the offer.$$C$.$ Yes, the ordinary rule which the courts have adopted is that acceptance is complete when a proper addressed and stamped letter of acceptance was received by the offeror.$$D$.$ No$,$ John withdrew his offer on September $23$rd$.$