Under the Constitution, it is the President who has the responsibility for relationships with foreign nations, although this responsibility is usually delegated to another position, called the Secretary of State.
Yes they needed to set down and talk to resolve their problem, if one listwnd to another
I believe it is B the president and the judiciary branch
Marbury v. Madison is important because it established the power of judicial review for the U.S. Supreme Court and lower federal courts with respect to the Constitution and eventually for parallel state courts with respect to state constitutions.