8522Which of the following was a disadvantage of the postage stamp？ 6576

Which of the following was a disadvantage of the postage stamp？ 查看材料 A.It had to be purchased by the sender in advance. B.It increased the cost of mail delivery. C.It was difficult to be passed on letters. D.It was of poor quality. 请帮忙给出正确答案和分析，谢谢！