What is the primary antitrust concern that led to the NAR settlement?

This question addresses a fundamental shift in real estate compensation practices and antitrust implications. Understanding this concept matters because it directly impacts how agents conduct business, how buyers and sellers negotiate compensation, and how the real estate market operates. The core concept concerns the cooperative compensation system where sellers' brokers traditionally set buyer broker compensation through the MLS, potentially creating price-fixing concerns. To arrive at the correct answer, we must recognize that antitrust laws focus on competition, not just price levels. While option A mentions high prices, it doesn't address the antitrust violation. Option B correctly identifies the cooperative compensation system as the primary concern because it allegedly reduced competition by standardizing rates. Option C is irrelevant as antitrust laws typically address too much competition, not too little. Option D is factually incorrect as buyers have always been able to hire agents. This question is challenging because it requires understanding the nuanced difference between high prices (a potential outcome) and antitrust violations (the structural issue). It connects to broader knowledge of agency relationships, MLS operations, and federal antitrust regulations.