It causes cervical cancer.
Then curve it up and swing at the ball, keeping your hand open in order to have maximum contact. Make sure you are hitting the ball at your highest reach. Swing hard at the ball and snap your wrist in order to keep the ball in the court. Always follow through with your arm to finish off your hit.
Normally BMI is mainly your weight. But it also helps with the age and gender as well. so Im going with C