I believe b. let me know if im wrong.
This theme was predominant in late 18th-century political thought in America and accounts in part for the elaborate system of checks and balances that was devised in the Constitution. The authors of the Federalist papers argued against the decentralization of political authority under the Articles of Confederation.
Answer:
Don't worry man, I got you.
Explanation:
The cause of the Encomienda system was the Spanish crown offering land and Indian slaves to conquistadors going to the new world. The effect was heavy depopulation of Indians from brutality and disease leading into African slaves becoming a new labor force.