Which of the following statements about the healthcare systems of middle-income countries is true? a. Middle-income countries are likely to misallocate resources, emulating the advanced health care systems of high income nations. b. In Korea, social insurance is supplemented by private care paid for by the wealthy. c. Unlike high-income countries, there is considerable variation in the use of medical inputs, but very little variation in health outcomes in middle- income countries. d. A characteristic of middle income countries such as China is a great disparity between health outcomes between urban and rural citizens. This is true because most citizens live in rural areas. e. Large variations in quality of service provision and social insurance schemes originating with employee coverage are characteristic of Kenya's health care system..