Why did the bubonic plague spread easily? It was present in the food supply.
It was caused by a virus.
It was highly contagious.
It was spread by people hiding in homes.

the answer is b. hope this !

it is a : ) always outside of government control

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.