Which of the following is an example of a foreign policy issue? A. whether or not

Which of the following is an example of a foreign policy issue?
A.
whether or not the United States should maintain its current troop commitment to the North Atlantic Treaty Organization
B.
whether or not the federal government should deploy the National Guard to areas that are affected by a natural disaster
C.
whether or not the United States military should increase troop levels using selective services policies currently in place
D.
whether or not vegetables grown in the United States should carry labels identifying the state in which they were grown