<span>I think It is a) Textiles</span>
I think the answer is diminishing marginal utility
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.
I think it is the first one
Lincoln freed the slaves by signing the emancipation proclamation.
