B: The Federal Government needs to respond quickly.
Congress needs to go through a long and careful process to get things done, not to mention them needing to have the majority of congress agree.
The president/executive branch of the government is made up of much less people, as well as the president himself being commander and chief of the military.
Time is very important during a national emergency, and the president can get things done quickly.
Hope this helps.
The court had declined new deal measures for the Great Depression.
They had weapons, their societies were separated, which made it easier for them to take over
Im pretty sure one of the main reasons is because of the treaty system