When playing sports, the factor that is NOT critical is C. expecting to win every time. It is important to understand that while winning can be a motivating factor in sports, it is not always possible to win every time. Sports also involve learning from both victories and defeats, improving skills, and enjoying the game itself. Expecting to win every time can create unnecessary pressure and disappointment, whereas focusing on personal improvement, teamwork, and sportsmanship can lead to a more fulfilling and enjoyable sports experience.