I'd say D. Let him compete in all the other events.
There are multiple reasons someone may develop anorexia. Sometimes it is because of stress or anxiety. Most commonly, it is the constant need to feel as if they weight too much and need to remain slim.
Answer:
The best answer to the question: Which zones do you think would be most affected by this disorder, would be, C: Proliferation and hypertrophic zones.
Explanation:
The reason why a human being is able to grow from his/her small body when borh, to his/her adult body size is in part because his/her bones continue developing and growing, meaning enlarging, until they reach their adult, and fully matured size. However, in people with Achondroplasia this is not the case. Essentially, people with this affection will have problems at the zones of the bone where both proliferation of the chondrocytes and hypertrophy of the tissue that has been produced takes place. This will cause for an incomplete enlargement and formation of the fully-grown and development of the bone, and which becomes evident in people with this affectation due to their limbs being more "child-like" than in adults who did not suffer from it.
Not two people are the same way. Some people have different bone densities then others. Some people's bodies react to differently with food and exercise
I think that drugs and their affects would be interesting to learn about, because its a big issue in our world today, and it's good to learn about these things (such as drugs/alcohol)