Final answer:
The Sherman Antitrust Act prohibits organizations from holding monopolies in their industries and promotes fair competition.
Step-by-step explanation:
The Sherman Antitrust Act is a federal law passed in 1890 that gives the government the power to break up corporations that are acting in restraint of trade by forming monopolies or engaging in practices that raise prices artificially. The Act prohibits organizations from holding monopolies in their industries, making option d the correct answer. It aims to promote fair competition and prevent anticompetitive practices such as price-fixing or dividing the market.