How did using metal help ancient Chinese people increase food production? It led to wet farming for rice.
It led to planting crops in rows.
It led to stronger plows for tilling.
It led to improvements in irrigation.

D I think I’m not quite sure but it makes more sense then the rest.

Explanation:

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

c

the articles of confederation placed most of the power on the feds