I think is B I'm not sure
The Louisiana Purchase was a land purchase made by United States president Thomas Jefferson in 1803. ... Thomas Jefferson approved the deal and used his constitutional power to sign treaties to buy the land. Napoleon Bonaparte sold the land because he needed money for the Great French War.
It believe it's the Pythagorean Theorem, named after Pythagoras in ancient Greece 2,500 years ago
The could easily get letters to the president about needing things
