It lies in the fact that the senior party to any relationship provided land and oversight to the junior party’s who in turn was expected to provide his lord with economic and military support.
I worked the problem out to show you
Answer:
The publication of Copernicus' model in his book De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), just before his death in 1543, was a major event in the history of science, triggering the Copernican Revolution and making a pioneering contribution to the Scientific Revolution.
The answer to this question is A he was looking for a route to the east
