In the early 1800s, explorers traveled into Louisiana Territory after it was purchased from O Spain
O France
O Mexico
O Great Britain.

d) the constitution rights of native americans and their right to self-government on reservations

your stuuupid lolz

explanation:

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."