The president has called ebola an international crisis and a threat to national security. why is this disease considered a threat to national security? the disease travels across international borders when people travel who have it. the disease appears and disappears throughout history. the disease is killing many people in africa. the disease is killing medical workers.

He seventeenth amendment to the us constitution calls for the direct election of all us senators. this means that the people of each state get to vote to decide who will be their two us senators. before this, the legislatures of each state chose the two us senators from that state with no direct involvement of the average voter. why would this amendment be considered a reform? how would it benefit the people? even today some people claim that the seventeenth amendment was a bad idea. what arguments could be made for reverting selection of us senators back to the state legislatures?

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

Andreus vesalius is known for being the first scientist to provide detailed and accurate information about human anatomy. his knowledge of human anatomy came from dissecting human bodies. which statement best shows why andreus vesalius’s discovery was important during the scientific revolution?