According to realism, what is the main aim of foreign policy?

According to realism, what is the main aim of foreign policy?
 
  a. protecting natural resources such as timber, oil, and fertile farmland
  b. promoting a country's self-interest
  c. finding solutions to problems shared by several nations
  d. reducing conflict in the interest of global peace

Question -2-

Which of the following is comprised of a broad array of the president's foreign policy advisers and is housed within the White House?
 
  a. the State Department
 b. the Department of Homeland Security
  c. the National Security Council
  d. the Central Intelligence Agency

Question -3-

Congress can exercise influence over foreign policy through its power to __________.
 
  a. command the armed forces
 b. ratify treaties
  c. recognize the sovereignty of foreign countries
  d. receive diplomats

Question -4-

President Obama's approach to securing peace between Israel and its neighbors is an illustration of __________.
 
  a. the power of deterrence
  b. the power of economic sanctions
  c. hard power
 d. soft power