What Is the Result of a Great Deal of Spending

What is the result of a great deal of spending by patients, insurance companies, and the government on medical care in the United States?

A) The benefits to medical care decrease at a decreasing rate.
B) The marginal benefits to medical care increase at an increasing rate.
C) The marginal benefit to medical care decreases at an increasing rate.
D) The marginal benefit of medical care is closer to zero than it would be if much less were spent on medical care.
E) The marginal benefit to medical care is constant.