Question

china implemented the one - child policy in 1979 because the population was expected to exceed people by the early 1980s. 500 million 700 million 1 billion 1.3 billion

Explanation:

Historical demographic data shows that China's population was projected to reach 1 billion by the early 1980s, which was a key driver for the implementation of the one-child policy in 1979.

Answer:

1 billion