On December 15, a lawyer received from 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." No other correspondence passed between the retailer and the lawyer until the following April 15 (four months later), when the retailer received from the lawyer a faxed order for "100 reams of your paper, catalog item #101."

Did the lawyer's April 15 fax constitute an effective acceptance of the retailer's offer at the prices specified in the catalog?

A. Yes, because the retailer had not revoked its offer before April 15.

B. Yes, because a one-year option contract had been created by the retailer's offer.

C. No, because under applicable law, the irrevocability of the retailer's offer was limited to a period of three months.

D. No, because the lawyer did not accept the retailer's offer within a reasonable time.