The best and most correct answer among the choices provided by the question is the third choice "natural monopolies"
Natural monopolies<span> arise where the largest supplier in an industry, often the first supplier in a market, has an overwhelming cost advantage over other actual or potential competitors; this tends to be the case in industries where fixed costs predominate.</span>
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Assessing opportunity cost involves <span>making choices and dealing with consequences.
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"Beyond a reasonable doubt" which a legal standard of guilt in Texas was used in criminal cases. It is the standard that should be met by the evidence of the prosecution in a criminal case. This means that there should be no other logical explanation that can be derived from facts not including the fact the suspect or defendant committed such crime.
