Answer:
no, it would not be fair because everyones body is different and if it makes someones elses body better and bigger and stuff it might not do the same for someone elses body so no i don't think its fair. haha just what i think (like i know anything)
Explanation:
The answer is a eating disorder. Reason is because b,d and c are all physical disorders in which your mind has no control over. However eating disorders are usually caused by a form of stress or worry about somthing in your head that causes you to not want to eat