The Zhou dynasty introduced the concept of the mandate of heaven, which asserts
that a dynasty rules only with the blessing of the gods, known as heaven. What
happens when a dynasty loses favor with the heavens?

a. The current emperor would be removed from power, and it would be passed on
to his son.
b. They can petition to heavens for an extension of their rule for a ten year period.
c. The heavens would take back the mandate, and the dynasty would fall and be
replaced by another dynasty.
d. Nothing, once a dynasty gained the mandate, they never lost it, no matter what
their rulers did