Answer:
A. Rich and educated
Explanation:
Their ideology was "Agrarianism, American nationalism, Anti-clericalism, Jeffersonianism, Liberalism, Classical liberalism, Populism, Republicanism", and these are the things backed by (of the four options) the rich and educated.
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Cahokia was one of the largest and possibly the capital city of the people that are referred to as the Mound Builders. Cahokia's size and the large number of people that lived there led to the main issues. Bad droughts and poor harvests meant people couldn't eat.
In addition to replacing the president if necessary, it's the duty of the vice president to
C. preside over the Senate
This is according to the US Constitution. The vice president can also be appointed as member of the Cabinet if decided by the president.