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:

b - those executed came from every social and economic class

your wrong i made a 2.34 out of 4 the answers are 1st qeustion all of them are correct. question 2 the han emperors chose smart, victorious men to work in the government. question 3 during the han dinasty, the teaching in the analects of confucius set the tone for public life. question 4 on a and b are correct.