On a Friday, Amy bought a $500 suede coat on her Suede Store Co. credit card and wore it out that night. The credit line was payable in monthly installments of $50. Unfortunately, it rained that night. The coat was badly damaged. The next morning, Amy tried to return the coat to the Suede Store. The store refused to accept the coat because of the damage. When Amy's first installment payment was due, she sent a check to the Suede Store for $250, which she clearly marked "Paid in Full." The Suede Store's clerk cashed the check. The next day, the manager realized that the check had been marked "Paid in Full." She immediately sent a check for $200, which reflects the $250 Amy sent minus the $50 monthly installment payment due. Amy has not cashed the $200 check and refuses to pay any more for the coat. If Suede Store sues Amy, will it win?

a. No, because the "Paid in Full" notation was clear.
b. No, because the clerk cashed the check.
c. Yes, because UCC § 3-311 allows organizations to send back checks to avoid accord and satisfaction.
d. Yes, because the amount owed was unliquidated debt.