Which of the Following Statements About Preemption Legislation Is Accurate

Which of the following statements about preemption legislation is accurate?

A) Congress has passed few laws extending its power and preferred to rely on Supreme Court decisions to extend the sphere of sovereignty for the national government.
B) While Congress has steadily increased the number of laws substituting federal policy for the states, the federal government is also more likely to join with the states in formulating policy.
C) It allows the states to pass bills creating a sphere of sovereignty immune from any interference by the federal government.
D) These are bills the President writes that must be approved by the Supreme Court to limit congressional activities.