单项选择题

W: When did you become interested in collecting stamps
M: Oh, when I was about ten years old. It’s an exciting hobby. You know, the first postage stamps were issued in Britain in 1840.
W: Really I didn’t know that. I did know that the charge for mail delivery before the appearance of postage stamps was paid by either the sender or the receiver. How much was the usual charge
M: Oh, about ten cents for a short distance. But post offices were losing money with that system. Rowland Hill, an Englishman, suggested using postage stamps. Here’s a picture of the first two stamps issued.
W: They both bear a picture of Queen Victoria.

Who paid for the mail delivery before the appearance of postage stamps（）

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