Which of the following describes the trends in health care costs in the United States as a percentage of gross domestic product (GDP)?
a. They have risen steadily since 1960 from about 5% to about 15%.
b. The higher costs right now reflect a recent, steep rise, but the overall trend is about even.
c. Costs have fluctuated wildly since 1960.
d. Costs rose steadily through the 1970s but have declined a little since then.
A
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