I would say #2, because it is very important to eat a well balanced diet while also working out and staying physically active to stay healthy! However, the question asks, "Which of the following is a guideline for practicing good nutrition." That being said I would say #4 "Consume foods with a variety of nutrients and adequate portions.
Hope this helps!
You forgot to post the options.
Inhalant dissolves the fatty tissue in the brain.
The answer is D, all of the above