The relationship between gross domestic product (GDP) and national health expenditures (NHE) is best described as which of the following? A. The NHE needs the GDP to grow for healthcare providers to be successful. B. GDP has been growing faster than NHE, so we can be sanguine about healthcare costs. C. NHE has been growing faster than GDP, so we should be concerned about sustainability. D. NHE is increasing because of inflation, demographic changes, and increased personal expenditures. E. Choices C and D