12) Give two examples of how the Song made Japan, Korea, and Vietnam part of their tributary System.

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Explanation:

The tributary system of China (simplified Chinese: ; traditional Chinese:  pinyin: Zhōnghuá cháogòng tǐxì), or Cefeng system (simplified Chinese:  traditional Chinese: pinyin: Cèfēng tǐzhì) was a network of loose international relations focused on China which facilitated trade and foreign relations by acknowledging China's predominant role in East Asia. It involved multiple relationships of trade, military force, diplomacy and ritual. The other nations had to send a tributary envoy to China on schedule, who would kowtow to the Chinese emperor as a form of tribute, and acknowledge his superiority and precedence. The other countries followed China's formal ritual in order to keep the peace with the more powerful neighbor and be eligible for diplomatic or military help under certain conditions. Political actors within the tributary system were largely autonomous and in almost all cases virtually independent.[1]

c. the dred scott v. sandford case,

answer; ///i believe that the correct answer is ; hieroglyphs or glyphs; the maya script, also known as maya glyphs, was the writing system of the maya civilization of mesoamerica; as always plz check first..good luck