Buyem faxed the following signed message to Zeller, his long-time widget supplier: "Urgently need blue widgets. Ship immediately three gross at your current list price of $600." Upon receipt of the fax, Zeller shipped three gross of red widgets to Buyem, and faxed to Buyem the following message: "Temporarily out of blue. In case red will help, am shipping three gross at the same price. Hope you can use them." Upon Buyem's timely receipt of both the shipment and Zeller's fax, which of the following best describes the rights and duties of Buyem and Zeller? 
Buyem may accept the shipment, in which case he must pay Zeller the list price, or he must reject the shipment and recover from Zeller for total breach of contract.  Buyem may accept the shipment, in (B) Buyem may accept the shipment, in which case he must pay Zeller the list price, or he may reject the shipment, in which case he has no further rights against Zeller.  Buyem may accept the shipment, in which case he must pay Zeller the list price, less any damages sustained because of the nonconforming shipment, or he may reject the shipment and recover from Zeller for total breach of contract, subject to Zeller's right to cure.  Buyem may accept the shipment, in which case he must pay Zeller the list price, less any damages sustained because of the nonconforming shipment, or he may reject the shipment provided that he promptly covers by obtaining conforming widgets from another supplier. 