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.
While the threat of mutually assured destruction seemed to fade with the end of the Cold War, the threat of "<span>B. the proliferation of weapons of mass destruction"</span> still exists
