​Which Physiological Processes Have Researchers Found Both Meditation and Qi

Multiple Choice

​Which physiological processes have researchers found both meditation and qi gong can affect positively?

A) ​They can both delay some aging-related brain changes.
B) ​They can both reverse some age-related brain changes.
C) ​They can both achieve attention-related brain changes.
D) ​They can both cause immune system function changes.