Which of the following statements is true about the introduction of health insurance in the U.S.?

The statement that health insurance in the U.S. was primarily provided through the private market is accurate. The development of health insurance in the United States has its roots in employer-sponsored plans, which gained popularity during World War II due to wage controls that compelled employers to offer additional benefits to attract workers. This led to a significant reliance on private health insurance, where employers fund health coverage as part of employee compensation, rather than a universal government-provided system.

In contrast to the private model, other countries with successful health care systems typically have government-backed programs offering universal coverage, which was not the case in the U.S. Additionally, affordability has historically been an issue, and many Americans struggled to access health insurance due to high costs, especially in the early stages of its introduction. After World War II, the government did not establish comprehensive insurance coverage for all citizens, but rather certain programs like Medicare and Medicaid were created later on, which do not cover all Americans. Thus, the private market's predominance in the provision of health insurance confirms the validity of this choice.