The correct option is B Both A and R are true, but R is not the correction explanation of A.
China passed the One-child Policy in 2015, which was rescinded by the state in 2016. China passed the law in an attempt to control its overgrowing population. However, the law resulted in a clear imbalance in its population. For instance, it resulted in labour shortage due to a rise in the population of senior citizens. Since senior citizens do not contribute much to the labour resource and depend on their children for survival, this policy harmed the economy. Therefore, the country was forced to rescind the law to expand its labour resource.