Today we're going to discuss the history of the postal service. In the 19th century, the introduction of the postage stamp revolutionized communication. Before stamps, the recipient often paid for the mail, which was expensive and inconvenient. The first adhesive stamp, the Penny Black, was issued in Britain in 1840. It featured a portrait of Queen Victoria and cost one penny, making it affordable for ordinary people. This innovation led to a dramatic increase in mail volume. Interestingly, the design was so effective that it remained in use for over 40 years, though it was printed in black, which caused postal workers to struggle with cancelling it clearly. Therefore, later stamps were printed in other colors.
❓ Tại sao những con tem sau này lại được in với màu sắc khác ngoài màu đen?
A. A. Để tôn vinh sở thích của Nữ hoàng Victoria
B. B. Để làm cho tem hấp dẫn hơn đối với những người sưu tầm
C. C. Để đảm bảo nhân viên bưu điện có thể hủy chúng một cách rõ ràng
D. D. Để giảm chi phí sản xuất
✅ 正确答案
C. To ensure postal workers could cancel them clearly