Which activity is an excellent strategy to help maintain strong teeth and healthy gums?

A. treating gum disease

B. treating tooth decay

C. wearing a mouth guard

D. eating a well-rounded, proper diet

D. eating a well-rounded, proper diet

A well-rounded, proper diet that includes foods rich in essential nutrients like calcium, vitamin C, and antioxidants can help maintain strong teeth and healthy gums. Consuming a diet high in sugary and acidic foods can contribute to tooth decay and gum disease.