Which medieval composer was also a politician and author famous for his writings on music theory?
a. geoffrey chaucer
b. philippe de vitry
c. josquin des prez
d. guillame de machaut

It was "B. Philippe de Vitry" who was a Medieval composer and was also a politician and author famous for his writings on music theory, since at the time not many people knew the fundamentals of such theory. 

There’s no picture, but i’ll give you a few of expeditions. lewis and clark began in 1804, louisiana purchase 1802, james town 1607