On December 15, Lawyer received from Stationer, Inc., a retailer of office supplies, an offer consisting of its catalog and a signed letter stating, "We will supply you with as many of the items in the enclosed catalog as you order during the next calendar year. We assure you that this offer and the prices in the catalog will remain firm throughout the coming year." Assume that no other correspondence passed between Stationer and Lawyer until the following April 15 (four months later), when Stationer received from Lawyer a faxed order for "100 reams of your paper, catalog item #101." Did Lawyer's April 15 fax constitute an effective acceptance of Stationer's offer at the prices specified in the catalog? 
Yes, because Stationer had not revoked its offer before April 15.  Yes, because a one-year option contract had been created by Stationer's offer.  No, because under applicable law the irrevocability of Stationer's offer was limited to a period of three months.  No, because Lawyer did not accept Stationer's offer within a reasonable time. 