Question

Which of these indicated that the Tang Dynasty had lost the Mandate of Heaven?

military defeats, rebellions, and economic troubles
earthquakes, economic troubles, and isolationism
rebellions, mass migrations, and military dictators
crop failures, reduced exports, and weakened currency

Answer 1

MIlitary Defeats rebellions and economic troubles

Answer 2

It was 'military defeats, rebellions, and economic troubles' that indicated that the Tang Dynasty had lost the Mandate of Heaven.

The mandate Heavens was the believes in China that the Heaven gave kings the policy to rule according to their wisdom and knowledge.