Answer:
5
Explanation:
i think it is five cause if you had a bad problem they keep for five years.
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.
