Answer:
The correct option is A,trade agreements.
Step-by-step explanation:
Trade agreements is business negotiations and conclusions reached with trading partners for mutual benefits of all parties involved, this approach is not being used by State Department in negotiating with foreign nations.
Peace accord or treaties is a ceasefire agreement reached by the State Department and foreign nations in a bid to promote American Government foreign policies with rest of the world.
Military invasions and alliances are tools of American government as evident in recent times.