Moscow became the center of the Orthodox Church A. after Constantinople was invaded by the Ottoman Turks. B. because it refused to accept icons. C. because it refused to acknowledge the pope. D. after the Mongol invasion of Constantinople.

A. After Constantinople was invaded by the Ottoman Turks. After the fall of Constantinople the only remaining center of the Orthodox Church was the Russian Empire and they called it the Third Rome after the fall of Constantinople. Becoming the new center of the Orthodox Church the Russian Empire tries to expand its power and preserve the culture of the church after the fall of Constantinople.