Talk about the three G's; Gold, Glory, and God.
Also, at the time, land was equal to power. The more land you had, the richer you were. This is a social and political reason, as well as economic.
Hope this helps you. Ask any questions if you need to!
The answer is A... sort of. Two-thirds (34) of the state legislatures may apply to Congress to call a Convention of the States to propose amendments to the Constitution. Then, three-fourths (38) of the state legislatures must ratify those proposals before they actually become amendments to the Constitution.