"A"
The answer option "A" is the only legitimate answer backed by solid proof. it does not make ridiculous statements or proves a ridiculous point like the others. There is no way the other answer options have such causes and effects, and are highly contraindication, and i would always highly recommend getting knowing your family history as genes play a lot in healthcare.
Yoga can improve flexibility and muscular strength
True , exercise helps to release endorphins and adrenaline and can help build up both mental and physical strength