Beginning on October 1, FuelCo and HeatCo exchange signed writings:
(1)October 1, FuelCo to HeatCo: Offer to Sell — Shipment of Bortex Coal Kindler just received at reduced price. Prepared within next ten days to sell to you any quantity. Please accept promptly.
(2)October 2, HeatCo to FuelCo: Purchase Order — Re your offer of yesterday. We accept. What quantities are available, and at what prices?
(3)October 3, FuelCo to HeatCo: Offer to Sell — Available: 13 tons. Price depends on amount ordered. What quantity shall we ship? Others are making orders. Supply is shrinking. Please respond soon.
(4)October 4, HeatCo to FuelCo: Offer to Buy — Re Bortex — will want all 13 tons delivered to our warehouse. Need price.
(5)October 5, FuelCo to HeatCo: Offer to Sell — Can deliver. Price: $800 per ton = $10,400. Please advise.
(6)October 6, HeatCo to Fuelco: Purchase Order — Thank you. We expect delivery.
(7)October 7, FuelCo to HeatCo: Purchase Confirmation — Okay. A.M. or P.M. delivery?
Which of writings 1-7 are best characterized as invitations to deal?
A.2, 3, and 4
B.1, 2, 3, and 4
C.1, 3, 5, and 7
D.1, 2, 3, 4, and 7
E.All of writings 1-7