Published in 868 C. E., this is the earliest printed work known to exist. a. edition of the Romance of the Three Kingdoms b. Census analysis. c. Buddhist text d. Daoist text e. copy of the travelogue of Zheng He.

c. Buddhist Text

Explanation:

Published in 868 C.E., The Diamond Sutra is said to be the oldest known printed work. It is, in fact, a Buddhist text. This means C is the correct option.

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