Both eagerly traded with all European countries is the true statement of China under Emperor Kangxi and Japan under Tokugawa Ieyasu.
After the Tokugawa achieved sovereignty over Japan in 1600, the policies remained in place. Shuin ships sailed to ports all over Southeast Asia, trading with Chinese merchants and local rulers and helping to establish large overseas Japanese communities.
Thus, option D, Both eagerly traded with all European countries is correct.
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