A) Analyze how the US government has responded to the increasing complexity of US foreign policy.

September 11 signaled the end of the age of geopolitics and the advent of a new age—the era of global politics. The challenge U.S. policymakers face today is to recognize that fundamental change in world politics and to use America’s unrivaled military, economic, and political power to fashion an international environment conducive to its interests and values.

Explanation:

The President sets the tone for all foreign policy. ... The Congress approves the President's picks for ambassadors and as a secondary function, can declare war. The President of the United States negotiates treaties with foreign nations, then treaties enter into force only if ratified by two-thirds of the Senate.

b. as prices rise, quantity demanded goes down.