I think it's B, it just makes the most logical sense to me.
Overall health, including weight is directly related to the cardiovascular system. Keeping a healthy weight reduces the amount of sodium in the blood stream, along with other fats. All of these excess nutrients in the blood stream can clog arteries in the cardiovascular system, so staying fit allows all blood pathways in the cardiovascular system to stay clear and keep the heart pumping and healthy.
Answer:
There is a growing concern over the physical fitness of children and adolescents because of growing obesity rates being the highest they've ever been I believe.
When you have high self esteem you are more confident you carry yourself taller and seem more happy all around
You are also just more happy in general you feel good about yourself