A cause was that Texas declared its independence from Mexico. It changed the U.S. by the U.S. gaining California, New Mexico, Utah, Arizona, Colorado and parts of Wyoming.
I don't think there will be. it requires a super majority to amend the constitution and super majorties rarely happen.
The answer is A, the rest don’t really seem reasonable. And during the middle ages it was a time for great process in arts and SCIENCE! And the only one involving science is A :))
Answer:
The answer is (A) All native American tribes in the east were required to move to one large reservation.
