A.it's true. Lack of water can also give u a heatstroke during hot weather
Physical: you are strong and/or active
Mental: you feel confident and happy
Emotional: *same as mental* You are more mentally stronger
Social: you become freinds with people who share your interests
The best choice for you will be option A because in volleyball it is illegal to hit the ball twice touch the net and to go underneath so the only legal move to to spike the ball.