The fall of the tang dynasty began with

lack of leadership
arguments over religion
fear of invasion
corruption from within

The point that is considered the starting point of the fall of Tang Dynasty is during Emperor Mu Zong reign, around the year of 821-824. He is known for his high-spending, alcoholics habits and as neglectful emperor.

The correct answer is The fall of the Tang Dynasty began with lack of leadership.

corruption from within

Explanation: As is often the case, the fall of the Tang Dynasty began with the rise of corruption from within. Emperor Xuanzong (712–755) severely neglected his duties; as a result, corrupt officials often ruled in his place. This eventually caused unrest among the population, and rebellions erupted. A series of uprisings followed, one after another, each weakening the empire.

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