The main idea behind the settling of western lands by americans in the early-1800s was known as

B)Manifest Destiny.

Explanation:

the constitution of the united states gave congress the absolute authority over immigration laws

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.