Which of the Following Refers to Federalism

Which of the following refers to federalism?

A) The Constitution's provision for shared power among national,state,and local governments
B) The principle that federal laws are supreme if a conflict between a federal and state law arises.
C) The principle that the government cannot take private property without paying just compensation
D) The provision for the protection of personal freedoms of speech and religion from encroachment by the government