Miranda Airways, a commercial air carrier, has a contract with Wurtherton, Inc., an airplane manufacturer, to purchase a new plane. Due to a sudden shortage of cash, Miranda Airways goes to MetrosBank. MetrosBank issues a document to Wurtherton that if Miranda does not pay for the transaction, MetrosBank would. Wurtherton considers the offer, and then sends an acceptance with additional terms. The additional terms stipulates that Miranda Airways could have the new airplane for a period of 10 years, and then return it to Wurtherton. Miranda Airways agrees to the acceptance, and Wurtherton hands the new airplane over to them. What UCC rule was applied when Miranda Airways agreed to the additional terms acceptance provided by Wurtherton? A) battle of the forms rule C) mirror image rule B) firm offer rule D) gap-filling rule