Which of the following statements about the handling of foreign policy in American history is LEAST accurate?

a. The Constitution places sole responsibility for foreign policy in the hands of the president.

b. The executive branch has the most, but not the sole, influence in shaping foreign policy. 

c. The executive branch has claimed primary responsibility for shaping foreign policy since the time of George Washington. 

d. The power of the executive branch over foreign policy has generally increased since the founding of the republic.

e. Public opinion and the pressure of special interest groups can place effective constraints on the executive branch's foreign policy options.