B endurance. Endurance is doing something for a long time, the longer you work out, the fitter you are
A balanced diet supplies the nutrients your body needs to work effectively. Without balanced nutrition, your body is more prone to disease, infection, fatigue, and low performance. Children who don't get enough healthy foods may face growth and developmental problems, poor academic performance, and frequent infections.
The answer is C. They are children's doctors.
Disease causing agents are viruses, bacteria, parasites, fungi, etc...
Categories of medicine used to treat these pathogens are:
Antibiotics
Antivirals
Antifungals
Antiparasitics