From my Knowledge,
If the head of the executive branch e.g. (The President) were subjected to a subpoena, then they have the right to claim executive privilege to withhold information from the other branches.
Answer:
The first answer, Lech Walesa.
Answer: A war between two U.S. allies is a matter of department policy foreign policy (my answer) critical policy domestic policy
Explanation:
The best answer for this question is A. This is because this court decision allowed the US government to place Japanese Americans into internment camps during WWII, and therfore taking away their rights, even if they were American citizens.