What did improved farming techniques lead to?
a: extinct animals
b: unhealthy populations
c: division of labor
d: large migrations of people
the answer is division of

C. Division of Labor

Explanation:

You stated it in the question

C is the answer because it is the division of labor

Explanation:

The correct answer is - B: during industrialization in China, the government controlled peoples jobs and access to products.

The communism and its principles have their basis in the self-sustaining. The governments that were following this ideology felt that in order to achieve that they have to control everything in the country, as well as plan everything in the country and for the people's needs.

One of the things that the communist governments did was that they were controlling the peoples jobs, how much they will work, where they will work, and in which manner they will work, usually without any option for progress in a career level. Also, the government was controlling the access of the people to the products, as its politics was that everyone should have certain amount of certain things and that's it, nothing more is needed, and nothing more will be allowed to be taken.