Why did China’s population grow from 60 to 100 million between the Tang and Song dynastic periods? 1) Chinese leaders encouraged the immigration of foreign workers.

2) Chinese farmers increased the food supply by improving irrigation.

3) Chinese emperors doubled the size of the country by military conquest.

4) Chinese engineers built dams decreasing the number of deaths from flooding.
Please tell me the correct answer. No link will be acceptable

What happened in georgia as a result of the supreme court ruling in brown v. board of education? question 3 options: the sibley commission was formed all public schools were desegregated the southern christian leadership was formed the general assembly passed laws to keep schools segregated.

What would you call a political system that is only meant to last for a short time

Which best describes california population when it became a state in 1850? a.because of the gold rush attracting settlers all over the world california population diverse.bcalifornia had banned foreign immigrants at the start of the gold rush.so,the states population was made up of entirely of americans from other parts of the country.c california had a large african population because many southern planters had moved their enslaved africans to start large farms.d the indian removal act had led to the relocation of thousands of eastern native americans to california.as,a result the majority of californias population was native american