The answer is a, b, c, e, f
it is a b c e f answer
The achievements of the Han dynasty include expanded trade through the Silk Roads, the establishment of a merit-based civil service system, territorial expansion, the invention of paper, and the promotion of Confucian education. However, it should be noted that silk was not discovered during this period. Therefore, the correct statements are A, B, C, E, and F.
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