D) Anti-Vietnam War Protests
(I think, I've heard them in a movie 2 years ago in my history class)
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.
Answer:
The answer you're seeking is both Senate and President.
