Which primary source provides evidence that columbus sailed to find a new route to the indies in 1492

a. a documentary about christopher columbus that aired on tv in 2005

b. a drawing in an encyclopedia showing columbus landing in the new world

c. a letter written by an official in the spanish court who arranged a meeting for columbus

d. a proclamation in 1972 commemorating christopher columbus' voyage

Why did jefferson make the louisiana purchase?

How do you think american life would change greatly, as soldiers went to war in europe?

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?