How did china stop china population from growing too much?

China made a one child policy because china was over-populated and still is.

Explanation:

In November 2013, following the Third Plenum of the 18th Central Committee of the Chinese Communist Party, China announced the decision to relax the one-child policy. Under the new policy, families could have two children if one parent, rather than both parents, was an only child.

just took the test the answer is b.