Answer:
The correct answer is option A. dietitian.
Step-by-step explanation:
 A dietitian is a graduate specialized in food and nutrition, which, unlike a nutritionist, is endorsed by law. His training includes practical training in hospitals and with communities. 
A dietitian must study for a minimum of 4 years in a university and have the option of obtaining a doctorate or a master's degree. 
These professionals are responsible for promoting health and providing the public, clients or patients with a therapeutic dietary model. They also seek to treat and prevent cases of malnutrition.