Why did Americans feel strongly about western expansion and Manifest Destiny?
a.
They believed that Americans had the right and duty to spread their culture westward across the continent.
b.
They believed that Manifest Destiny gave them the right to expand the United States and eventually conquer Mexico.
c.
They believed that selling California was one way settlers could finance newer settlements in Oregon country and build better trails from East to West.
d.
They believed that Native Americans and Mexicans would eventually support this expansion.