Antitrust laws make which of the following illegal?

• A. Product innovation by monopolies
• B. Collusion between firms to fix prices
• C. Government subsidies to small businesses
• D. Competitive advertising among firms

Answer: (B)

Verified step by step guidance

1. Understand the purpose of antitrust laws: They are designed to promote competition and prevent practices that restrict it.
2. Identify what 'collusion' means: It is when firms agree to fix prices or output to reduce competition, which harms consumers.
3. Recognize that antitrust laws specifically target agreements like price-fixing, market division, and other anti-competitive behaviors.
4. Note that product innovation by monopolies, government subsidies, and competitive advertising are generally not illegal under antitrust laws.
5. Conclude that the illegal activity under antitrust laws is 'collusion between firms to fix prices' because it undermines competitive markets.