Which of the Following Is True About Exclusively Federal Area

Multiple Choice

Which of the following is true about exclusively federal area of government regulation?

A) It concerns those internal matters where uniformity on a nationwide basis is essential.
B) In this area, state regulation is permitted if the Congress has failed to expressly regulate the area.
C) It concerns those matters that are exclusively within the states' power.
D) It includes intrastate activities that do not have a substantial effect on interstate commerce.
E) It concerns those subjects over which the federal government has preempted the field.