6. Which of the following could help decrease the rate of increase of spending on health care in the United States? a. a reduction in the deductibles on private health insurance policies b. an increase in the coinsurance rate on health insurance and subjecting a larger volume of services to coinsurance c. extension of Medicaid insurance to all persons who are poor d. a reduction in the coinsurance rate on health insurance and subjecting a smaller volume of services to coinsurance