Final answer:
Under the Sherman Act, Master Manufacturing Corporation's exclusive market control is only a violation if acquired through anticompetitive means; achieving market dominance through business skill is not prohibited.
Step-by-step explanation:
Master Manufacturing Corporation controls the market for its product exclusively. Under the Sherman Act, the legality of this control depends on how the company acquired its market power. Simply having a monopoly is not a violation of the Sherman Act. However, it is a violation if the company acquired this power through anticompetitive means. Gaining control through business acumen, such as providing better products at lower prices, is not prohibited. The Sherman Act was established to prevent businesses from engaging in unfair practices that restrained free trade and to promote market competition. It empowered the federal government to dissolve trusts and monopolies that restrict competition.