The correct answer is C) growth.
America changes through times of growth and cooperation.
That is one of the most proper ways to adapt to changes and new scenarios. Past were the times where the use of force was needed, those imperialistic times of invasions and wars. The United States prospers through trade and cooperation, changes, and adapts into modern times. An example of this is the North America Free Trade Agreement (NAFTA) that signed in 1993 with Mexico and Canada. That agreement was recently modernized and now has a new name: USMCA, the United States, Mexico, and Canada Agreement that right now is being revised in Congress.