Gloria, a potter, needs a specific type of glaze to finish a large piece she is working on. She phones Ceramic Supply Co., a wholesaler, which says it can ship her the glaze for $35 plus $10 shipping and handling. Ceramic Supply Co. says it will bill her once the shipment goes out, because it does not yet have the glaze in inventory. Gloria agrees and hangs up. Which word best describes Gloria's contract with Ceramic Supply Co.?
A) Executory
B) Executed
C) Exculpatory
D) Formal