Which of the Following Has NOT Been Shown to Be

Which of the following has NOT been shown to be a consequence of China's one-child policy?

A) an unbalanced age ratio with a growing elderly population and a much smaller working population
B) a skewed sex ratio with a larger proportion of the population being male than female
C) a dramatic decrease in the birth rate that began shortly after implementation of the one-child policy
D) human-rights abuses,such as forced abortions