Concept:Trade credit terms state the cash discount rate, the discount period, and the final credit period.Explanation:The customer receives a 3% discount for paying within 9 days.So the discount rate is 3 and the discount period is 9 days.The full invoice is due within 30 days, so the net credit period is 30.Standard notation is discount rate/discount period; net credit period.Therefore, this is written as 3/9; net 30.Answer:Option A: 3/9; net 30.