PLEASE HELP ASAP How were Native American political systems different from Mesoamerican and early river civilizations?

How voting rights have changed since the end of the civil war

Look at the graph. where p is price and q is quantity, what might cause a move from b to a?

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.