Disease prevention: Participation in gymnastics can help maintain a healthy body, which is key to preventing numerous health conditions such as asthma, cancer, obesity, heart disease and diabetes. Being involved in gymnastics helps encourage a healthy lifestyle, including regular physical activity and eating a well-balanced diet.
His father nods but clenches his fist which means he's not happy with the trial but he's trying. His mother also forces a smile. I think it's D because, though his parents may not like it, they are trying.