D,it never acceptable to ignore rules or etiquette but A, when no one else notices you ignored the rules.
Answer:
1. National Basketball League
2. Basketball Association of America (BAA) and National Basketball League (NBL)
3. June 6, 1946,
4. There are currently 30 teams in the NBA. The league is divided up into two conferences, the Eastern Conference and the Western Conference.
5. Los Angeles Lakers and Boston Celtics
Explanation:
Walking, running, any exercise that increases heart rate
