To control population growth
instituted a one-child policy in 1980.
a. japan
b. china
c. uganda
d. nigeria

B. China

Explanation:

https://www.britannica.com/topic/one-child-policy

One-child policy, official program initiated in the late 1970s and early ’80s by the central government of China, the purpose of which was to limit the great majority of family units in the country to one child each. The rationale for implementing the policy was to reduce the growth rate of China’s enormous population. It was announced in late 2015 that the program was to end in early 2016.

B

Explanation:

what’s your question

the answer for 3 is b and the answer for 4 is d