The answer is D. letter A could increase the chance of injury, but not necessarily depending on other kinds of workouts available. Letter B is definitely not the answer because there can be many variations to make running a more enjoyable exercise. And C is not the answer because running is a great form of exercise for the body. the answer is D because cardio may increase the chances of leading to a heart attack.
So you would need to have all of these following characteristics Communication Skills, Emotional Stability Flexibility Good Attention to Detail. Interpersonal Skills Physical Endurance. . Problem Solving Skills
