WILL GIVE BRAINLIEST ANSWER ASAP...please:) The area labeled '2' on the map became part of the United States as a result of which of these?

A) The Civil War

B) The Mexican War

C) The Mexican Cession

D)The Gadsden Purchase

States' compliance with the native american reservation treaties drawn up by the federal government for the native american nations is:

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.

How did the united states ironically create a slaverybased market economy and democratic political system?