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问题 Questions are based on the following data.

[br] Approximately what was the percent increase in the annual revenue from all greeting card sales from 1990 to 1993.

选项 A、50％
B、45％
C、39％
D、28％
E、20％

答案 D

解析此题关于时间做对比，求百分比的形式为from A to B，需要参考左图。1990年的销量是4.5 billion，1993年的销量是5.75 billion，所以答案是(5.75-4.5)/4.5×100％，约为28％，选D。

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