The answer is D. Choosing a protein supplement.
It is the only action that can be completed effectively and safely. Diagnosing a disease through internet resources can be dangerous and people misdiagnose themselves causing panic and worry. The best way to diagnose a health problem is to speak to your doctor. Choosing an antidepressant is something only a professional medical practitioner can do. You cannot treat an eating disorder online, an eating disorder is a mental health condition and needs the right kind of treatment through psychological and medical support.
Here is the answer based on the given situation above. If few Guatemalans appear to be acute malnourished and in fact, they mostly appear healthy, but in reality, they are not, this is because they are not getting enough food and proper nourishment. They have the food, but it is never enough to fulfill the required amount to achieve good health. Hope this helps.