Well you can cancel a few out...
cook - no, I mean you're just cooking you may not know a lot about nutrition
epidemiologist - they determine diseases and such, so no.
Dietitian - Yes, expert in nutrition
Health Educator - I mean maybe, but they may not know anything about nutrition
Answer: Diagnostic and statistical manual of mental disorders
Explanation:
the lungs and bloodstream i hope this is right if not tell me and ill do more studying