What did Copernicus and Galileo have in common? A) Both of them published works that challenged the views of the Church. B) They both believed in the geocentric theory of the universe. C) They were both imprisoned by the Church. D) Neither of them could test out their ideas about the universe ...

A) Both of them published works that challenged the view of the Church.

Both Galileo and Copernicus believed the heliocentric theory of the universe, which contradicted the Church's belief in the geocentric theory. Copernicus basically founded the heliocentric train of thought, and Galileo pretty much proved it with his use of the telescope.