What were the 3 reasons for manifest destiny? (optional) i also need a link to where the info came from

It had a future that was destined by God to expand its borders, with no limit to area or country. All the traveling and expansion were part of the spirit of Manifest Destiny, a belief that it was God's will that Americans spread over the entire continent, and to control and populate the country as they see fit.

www.let.rug.nl/usa/essays/.../manifest-destiny/the-components-of-manifest-destiny.php

a characteristic is a deep cut in the earth or left over rock aka till.  

i only have few minutes according to the map above, which shows religious cultural regions, what two religions are most commonly practiced in africa? a. christianity and buddhism b. buddhism and hinduism c. islam and christianity d. hinduism and islam