Which department is responsible for assisting and debriefing the president on all foreign matters?
A. Department of Defense
B. Department of the Interior
C. Department of State
D. Department of Homeland Security

Respuesta :

It would be the "Department of State" that is responsible for assisting and debriefing the president on all foreign matters, although the President is ultimately responsible for all things having to do with foreign policy. 
the department of state is the answer