Answer:
C.) transcendental meditation
Step-by-step explanation:
On the given image we can see that the most impact on stress and anxiety relief has transcendental meditation. The lowest amount of impact has concentration or contemplation and the middle ground would be other techniques, here in our case exercising or spending time with friends. Meditation has long been proven to help with many mind related issues and especially when it comes to stress or anxiety. But it is not something that will make it go away completely.