The answer is A. "Tennis."
Tennis is generally not a sport played as a "team." It usually consists of two people playing one on one.
Could it be Birth control?
Answer: Sports is a good thing for some children because of self-esteem issues. Confidence can also be built for the children and this is important for the future. By participating in sports, children learn to set goals. However, healthy encouragement is a great thing for kids, but only if the children want to continue playing. If the parents are doing this for their own benefit because they played sports or they wanted to play at that age, the line has been crossed.