A、An Arizona’s Medicaid programme. B、A punishment system. C、A reward mechanism. D、A healthcare organisation. D题目问Medicaid是什么。新闻中

If a new idea in America becomes a law, people who suffer from obesity could suffer financially too. The US state of Arizona wants to charge overweight citizens $50 annually if they fail to follow their doctors’ advice. People with children or who are overweight because they suffer from a medical condition would be excluded.
   If the idea is approved by Congress, smokers and diabetics who fail to stick to a healthy lifestyle will also have to pay. Medicaid, the organisation which provides healthcare to the poor in the USA, costs the government $339 billion a year. Monica Coury, assistant director at Arizona’s Medicaid programme, said that this proposal would ask people to give something back.
   She said that Arizona would take a carrot and stick approach to the problem. As well as punishing people who go against their doctor’s wishes, awards would be offered for following advice, possibly a keep-fit video.
   Arizona’s senator Kyrsten Sinema has not backed the plans, saying that there isn’t a system to decide whether someone is or isn’t following medical advice. Other critics claim that people don’t need the government to look after them: if they want to be fat and smoke, the "nanny state" shouldn’t try to stop them.
5. What is the new idea of Arizona?
6. What is Medicaid?
7. Why do Kyrsten Sinema go against the plans?