What is a collective bargaining agreement (CBA)?

A collective bargaining agreement (CBA) is fundamentally a legal contract that outlines the terms and conditions of employment for players in the NFL. It is negotiated between the National Football League (NFL) and the National Football League Players Association (NFLPA). The CBA governs various aspects of the working relationship, including player salaries, benefits, working conditions, and other rights and responsibilities of both the league and the players.

The agreement is critical for ensuring that players have a voice in their employment circumstances and can negotiate for fair treatment and equitable working conditions. It establishes the framework within which all negotiations and interactions between the league and the players occur, making it a cornerstone of labor relations in professional sports. The other choices, while 관련 ideas, do not encapsulate the comprehensive nature and purpose of a CBA as thoroughly as the correct answer does.