Because the European immigrants wanted to colonize America and the natives did not want to give up the land.
The land was free and perfect for farming, if settlers survived the journey to Oregon the land was all theirs. But not only did the US like it, Britain and Russia also liked it. So the US told people to move there ASAP so it would officially be claimed by America.
Concerned about the Catholic minority in Maryland, Leonard Calvert ordered the Second Lord Baltimore to <span> c. make a law requiring Catholics to practice their faith quietly and privately.</span>
<span>Noticing nice things about people, and telling them, is an example of B. Good communication.</span>
