Enotes is a good website that can help you and also answers.com
I think letter C is the closest. <span />
June 7, 1494- The Treaty of Tordesillas
November 1, 1512-Michelangelo's paintings on the ceiling
of the Sistine Chapel
Martin Luther posts 95 theses on October 31, 1517
july 26, 1533-Pizarro and his men kill the Incan
Emperor Atahualpa
Answer:
The motivation for the purchase being a big accomplishment was Jefferson himself.
The motivation for free access to the Mississippi River, thus allowing merchants to ship and sell American goods all over the world was motivated mainly by economic purposes.
The motivation behind gaining control of the territory thus preventing other countries from threatening the United States was motivated mainly by military purposes.