Which of the Following Most Accurately Compares Roman Catholicism and Greek

Which of the following most accurately compares Roman Catholicism and Greek Orthodoxy?

A) The differences between Roman Catholicism and Greek Orthodoxy were based on basic tenets of faith.
B) Both Roman Catholicism and Greek Orthodoxy believed that Jesus became human to atone for humanity's sins.
C) The key differences between Roman Catholicism and Greek Orthodoxy were in heritage, customs, language, and levels of civilization.
D) Both Roman Catholicism and Greek Orthodoxy were retreating from Islam's expansion.