It was not called, but I would guess Indian Removal
Manifest Destiny is a term for the attitude prevalent during the 19th century period of American expansion that the United States not only could, but was destined to, stretch from coast to coast. This attitude helped fuel western settlement, Native American removal and war with Mexico.
Pollutants is the general term.
Chemical pollutants. Waste pollutants. Chlorofluorocarbons
tbh it's been about a year since i studied this stuff in HS
so it is ether C or D but i think the best answer is D
They came to trade fur, they also were looking for new land and a good route to the Pacific, and sought to convert American Indians. :)