What is the name given to the belief that the united states had the right and duty to expand across the north american continent?

What is the relationship between surface winds in the northern and southern hemisphere?

How is the uk’s government is solving the air pollution problem?

Which best describes the purpose of the south carolina exposition and protest, which was written by john c. calhoun? a) to explain why the south was nullifying the tariff of 1828 b) to describe the ways the tariff of 1828 would southerners c) to persuade northern states to rebel against the federal government d) to ask england for if the south decided to secede from the union