In the Confucian Tradition, What Idea Did the Mandate of Heaven

In the Confucian tradition, what idea did the Mandate of Heaven establish?

A) That for people to reach Heaven, they must sacrifice animals regularly
B) That the ruler himself was a god
C) That rulers are given the right to rule from Heaven through moral character and good governance
D) That rulers have the right to govern with an iron fist when necessary for the good of the people
E) That the Supreme Being has established laws that must be communicated to the people