The best and most correct answer among the choices provided by the question is the third choice "natural monopoly."
A natural monopoly<span> is a distinct type of </span>monopoly<span> that may arise when there are extremely high fixed costs of distribution, such as exist when large-scale infrastructure is required to ensure supply.</span>
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Answer:
In the United States, voting poll taxes (whose payment was a precondition to voting in an election) have been used to disenfranchise impoverished and minority voters (especially under Reconstruction).
"a challenge for Medicare and Social Security"
She had it for a litt<span>le more than two years</span>
