A. to educate patients on proper dental hygiene
B. to prevent and correct abnormally spaced teeth
C. to promote healthy teeth and gums
D. to diagnose and treat diseases affecting the teeth and gums
The correct answer is D. Dentists diagnose and treat problems with a patient's teeth, gums, and related parts of the mouth. They provide advice and instruction on taking care of teeth and gums and on diet choices that affect oral health.
