A is the answer. This is because this was not covered by the Twin studies.
Good luck!
-RxL
Heart disease, lung disease, gum disease, throat cancer, halitosis
The best answer to the question above would be letter c. The mode of exercise refers to the <em>type </em>of exercise performed. These are exercises that fall under categories such as strength, flexibility, agility training and all those categories of exercises for the sake of training for function.
