How did the Northwest Ordinance influence the expansion of the United States? A) It allowed American Indians to become full citizens of the United States.
B) It gave women the right to vote in U. S. territories.
C) It created rules for how new states could join the country.
D) It made slavery illegal in all future territories the United States might gain.

C) It created rules for how new states could join the country.

Explanation:

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.