How did the qin dynasty lose the mandate of heaven ?
a. thought invasions by nomadic herdsmen the emperors army couldn't defend against.
b. through natural disasters the government was unable to cope with.
c. through famine caused by many years of drought.
d. through uprisings caused by the harsh policies of legalism.

The Qin dynasty loses the mandate of heaven through Thought invasions by nomadic herdsmen the emperor’s army couldn't defend against.

Explanation:

In spite of its brevity, the Qin dynasty left significant checks on Chinese culture. Therefore, the name "China" is gotten from the name Qin ("Ch'in" in previous Romanization frameworks). Following the Zhou Dynasty, China wound up associated with an eternal clash between the different locales for incomparable control of the nation. A progression of triumphs by the territory of Qin towards the finish of the States of Warring time frame brought about their total success of China in 221 BCE when the Qin realm bound together China without precedent for its history.

the answer to this question is the third option. hope this

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explanation: