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Seller has a purchase money security interest in one of Debtor's meat-processing machines. Seller filed a financing statement on the day the machine was delivered, perfecting its interest. Bank One already had a security interest all of Debtor's equipment and after-acquired equipment. Which party has superior priority rights in the meat processing machine? Select one: a. Seller because a PMSI in equipment takes priority over a prior interest if the Seller perfects and notifies the Bank prior to delivery. b. Seller because a PMSI in equipment takes priority over a prior interest if the PMSI is perfected within 20 days after he receives it. C. The creditors have equal priority d. The party who is first to repossess the collateral