Answer: Lao Tzu
More in details:
Lao Tzu was a mystic philosopher of ancient China, best known as the author of the Tao Te Ching. His association with the Tao Te Ching has led him to be traditionally considered the founder of Taoism. He is also revered as a deity in most religious forms of the Taoist religion, which often refers to Laozi as Taishang Laojun, or "One of the Three Pure Ones". Laozi translated literally from Chinese means "old master" or "old one", and is generally considered honorific.
1 or 4..
I'm pretty sure its 4 though, its been a while since I learned about this, but I'm 90% sure its 4
I think c but it might be very wrong
The best option would be that "<span>a. The collapse of imperial power coincided with the demographic impact of epidemic disease and external threats," since external enemies had more power to attack and pillage. </span>