The Southeastern tribes lived in political units known as: O serfdom
O kingdoms
chiefdoms
states

C. Chiefdoms.

Explanation:

Serfdom is not a political unit, but a term describing a farmer in the middle ages in Europe who worked another lord´s land and did not own his own property. Kingdoms are also generally European, and the natives were definitely not ruled by a king. States are individual parts of a country, as in the United STATES of America. Chiefdoms are the only answer even remotely associated with the Native American peoples.

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