What are the three stages of reimbursement accounting? Select one: O a. commitment, undelivered orders outstanding (UOO), Accrued Expenditures Unpaid (AEU) O b. commitment, undelivered orders outstanding (UOO), Accrued Expenditures Paid (AEP) O c. unfilled customer orders, Fill customer orders uncollected, collected O d. undelivered orders outstanding (UOO), Accrued Expenditures Unpaid (AEU); Accrued Expenditures Paid (AEP)