Which Statement About the Making of United States Foreign Policy

Which statement about the making of United States foreign policy is accurate?

A) State governments, through their ability to negotiate independent trade agreements, have preeminent authority in making foreign policy.
B) The Senate, because of its power of treaty ratification, has more power in setting foreign policy than does the President.
C) The Supreme Court, because it can rule on the constitutionality of executive actions, dominates foreign policy.
D) Congress and the courts have some authority over foreign policy, but the President and the state department have the greatest authority.