Which department is responsible for assisting and debriefing the president on all foreign matters?

ADepartment of Defense
BDepartment of the Interior
CDepartment of State
DDepartment of Homeland Security

Verified Answer :

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