In the 1970s, how did the chinese government seek to limit the country's population growth?

by encouraging its citizens to immigrate to india
by encouraging families to have one child each
by increasing the availability of social services
by starting a war with india

To curb the rapid population growth in China during the '70s, a one-child policy was put into place by the Chinese government. Couples should only have one child. Rewards were given to those who complied while those who violated were fined, or reportedly, underwent forced abortions.

Explanation:

answer; taking up arms to defend the nation;