After world war ll, ussr extended its sphere of influence into yugoslavia and albania by stationing troops there for many years appointing the head of state in each nation giving soviet leaders laical government jobs supporting the government already in place

sustaining troops there for many years

A) stationing troops there for many years.

Explanation:

the answer is b. hope this

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.