The best surface to run on is one that's ?
A. hilly so that you can improve your cardiovascular endurance.
B. as hard as possible so that it adds more stability to your foot.
C. uneven so that the tendons and ligaments in the ankles and knees are strengthened.
D. smooth and soft so that it can cushion the stresses of running

Respuesta :

The best surface for a beginner to run on is smooth and soft so that it can cushion the stresses of running. For a more advanced runner, hills could be beneficial in improving their training and cardiovascular endurance.