Which of the following statements is CORRECT？A．The dependency ration in Japan is the lowes

Which of the following statements is CORRECT？

A．The dependency ration in Japan is the lowest.

B．Pension used to be more than sufficient.

C．Governments pay for pension of the retired.

D．The pension system is likely to break down.

请帮忙给出正确答案和分析，谢谢！