The Gadsden Purchase, or Treaty, was an agreement between the United States and Mexico, finalized in 1854, in which the United States agreed to pay Mexico $10 million for a 29,670 square mile portion of Mexico that later became part of Arizona and New Mexico. Southerners wanted this land in order to build southern transcontinental railroad, it also showed the American belief in Manifest Destin
C and E are definite answers and A and B are definitely not. I suspect D isn't either but in one phase of the Korean war UN troops which were largely American pushed the North Koreans back across their own border. However I would stick with C and E.
