I think C. Hopefully I helped, health is not really my forte
Answer:
5 Best Workouts to Make You More Flexible
Take a yoga class. Yoga reduces stress and allows you to focus by using breath control, simple meditation and bodily postures. ...
Use foam rollers.
Try tai chi.
Add stretch bands to your routine.
Choose dynamic stretching over static stretching.
Explanation:
D. Regular Exercise has been shown to reduce the physical effects of stress.
A wouldn't be correct because at home, you can find plenty of time to relax.
B would be wrong because it is opinion based and would be extremely difficult, if not impossible to experiment for.
And C would be wrong because mental discipline doesn't necessarily means you can take away stress.
Hope this helps!
~GeeksandNerds
