Why Did Ming China Escape the Sectarian Warfare That Ravaged

Why did Ming China escape the sectarian warfare that ravaged Europe?

A) All Chinese people shared one religion, so there was nothing to cause conflict.
B) Chinese government was so centralized that regional leaders lacked the ability to fight in defense of their religious beliefs.
C) European visitors told Chinese leaders about religious warfare in their homeland, and the Chinese vowed to avoid making the same mistake.
D) The Chinese believed it was the emperor, rather than any religious group, that held the mandate of heaven, so no sect was favored over the others.