Final answer:
Nationalism, democracy, and socialism were part of the 'Three Principles of the People' by Sun Yat-sen.
Explanation:
Nationalism, democracy, and socialism were included among the 'Three Principles of the People' proposed by Sun Yat-sen in early-20th-century China. Nationalism emphasized pride in one's national identity, democracy advocated for governance by the people, and socialism focused on public ownership of resources and addressing economic inequalities.
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