B I think as you can write and create a study book on the computer.
The answer is bruises but I don't know if thats one of your options
Stretch and grow to know your boundaries/limits as to what you can and cannot do.
Answer:
He handles challenges with a positive attitude
Explanation: Good mental health indicates accepting the challenges and dealing with them with a positive attitude. only a person with a healthy mInd can achieve this task in everyday life.
Exercise is good for physical as well as mental health but not a criteria to judge the mental health, good sleep of 8 hours repairs our body for the next day and meeting friends and enjoying time with them also adds benefits for our mental health.
But here the best possible answer for knowing the good mental health is handling challenges with a positive attitude.