China's one-child policy has produced? a. abundant youth-laborers
b. a good ratio between workers and retirees
c. 32 million more boy than girls under the age of 20
d. increased job opportunities for boys

The one-child policy was a program in China that was implemented nationwide by the Chinese government in 1980 in order to limit most Chinese families to one child each. The policy was enacted to address the growth rate of the country's population, which the government viewed as being too rapid.

The answer to the question is c.