The Supremacy Clause of the Constitution of the United States (Article VI, Clause 2), establishes that the Constitution, federal laws made pursuant to it, and treaties made under its authority, constitute the "supreme Law of the Land", and thus take priority over any conflicting state laws.
C. Grand Jury - A grand jury is a legal body empowered to conduct official proceedings and investigate potential criminal conduct, and determine whether criminal charges should be brought.
From what I know, the Mongols we're known for not making huge changes in the lives of their subjects. This is what allowed the Mongolian empire to grow so large. I hope this helps