B. Dual-system healthcare means that while Americans with good insurance or significant wealth receive top-notch medical care, those without insurance receive neither any medical care at all nor medical care of low quality.
In a two-tier or dual healthcare system, individuals who can afford it have access to a secondary tier of care that may be more expensive, of higher quality, or supplied more quickly than the primary system. Healthcare is typically both publicly and privately funded, but how much of a quality difference there is depends on how the two systems are run, financed, and governed.
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