Answer: Heliocentrism
Explanation:
Humanism is the devotion to the welfare of human beings. Materialism explains that all things are formed as a result of material interactions.
Geocentrism proposed by Ptolemy explains that the Earth is placed in the center of the universe.
Heliocentrism proposed by Nicholas Copernicus states that the Earth and other planets are all at the center of the universe revolving around the sun. It contradicted the traditional Christian views about the universe.
The first one is C. The second one is D.
Russia was the most powerful country during the 1970s to 1990s their priority was to spread communism through out the world
