Final answer:
Club managers are typically members of organizations specific to their sport, and none of the provided options are correct for club managers. The television poll about the NFL championship does not represent all football fans in America because it likely involves a biased sample.
Step-by-step explanation:
Club managers, who oversee the operations of sports clubs and teams, typically belong to a professional organization related to their specific sport. The correct answer to which professional organization the club managers belong to is none of the options provided: a) FIFA, b) PGA, c) NBA, d) NFL. Each of these organizations serves different sectors within sports: FIFA (Fédération Internationale de Football Association) governs international soccer, PGA (Professional Golfers' Association) is for professional golfers, NBA (National Basketball Association) is a professional basketball league, and NFL (National Football League) is a professional American football league.
About the poll conducted by a television sports program about the NFL championship, those who participate in the poll by calling the number on the screen are not necessarily representative of all football fans in America. This is because the sample may be biased towards those who are more engaged or interested enough to take the time to place a call, or those who happen to be watching the program and are thus not a random selection of all football fans across the country.