The government controlled agriculture through collective farms.
I think the answer is b or c because B is all about money. When you have lost of money you want a lot of things. while c is saying how people back then had to work for people and they got noting for it.
-China's physical geography made farming possible but travel and communication difficult.
-geography kept early China culturally and economically isolated from the rest the world.
Because they need to treat there kids with care