How did the tax system work under the Yuan dynasty?
It was based on class, with native Chinese people paying the highest taxes.
It was based on trade, with artisans collecting taxes on the goods they sold.
It was based on class, with the upper classes paying the highest taxes.
It was based on trade, with native Chinese people collecting taxes on Mongol trade.

They guys above me is wrong!

i think its A

Explanation:

The answer is A

Explanation:

If you actually listen to the lesson, it did said lower class of chinese people paid the taxes mostly, and people who wasn't chinese, they didn't paid taxes, and upper classes of chinese paid little of the taxes.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.