Instruments of US foreign policy
The United States pursues its four main foreign policy goals through several different foreign policy types, or distinct substantive areas of foreign policy in which the United States is engaged. These types are trade, diplomacy, sanctions, military/defense, intelligence, foreign aid, and global environmental policy.
The Gadsden Purchase enabled the United States to "B. Increasecrop production in the Southwest," since this was a purchase of relatively fertile land in the region.
The American communist emerged as committed militants within the unemployed movement. And became community leaders in liberal, cultural, and student organizations. They became a major force in several important CIO unions.
I believe it is C. He used extreme violence to scare enemies into surrendering.