Why was the open-border policy important for enabling China to prosper during the rule of the Song dynasty? Select all that apply. Chinese farmers could produce two rice crops per year, selling one for cash.

China could introduce and sell new kinds of tea throughout Southeast Asia.

Traders could sell many varieties of Chinese spices in faraway markets.

Chinese merchants could import faster-growing rice from Southeast Asia.

How many citizens of mexico does it take to equal the ecological footprint of the average citizen of the united states? it takes nearly three mexican citizens to equal the ecological footprint of the average u.s. citizen. it takes about 12 mexican citizens to equal the ecological footprint of the average u.s. citizen. it takes just over eight mexican citizens to equal the ecological footprint of the average u.s. citizen. two citizens of mexico equal the ecological footprint of one average citizen of the united states. they are essentially equal?

Brainliesttt asap!me : ) answer in your own words. what was the relationship between medieval theories about scientific reasoning and the kind of reasoning favored during the scientific revolution?

What do you think was a drawback to this method of calculating distance