The reason why ethics differs when we're talking about people, companies, nations is that all of these have interests which may differ. What happens then with differing interests is that it also lead to different moral and value systems which again in turn lead to different ethics. Most usually, the actual source why ethics differ is either due to the interests or wishes of a particular social group mentioned here.
        
             
        
        
        
D is the answer because i took the same test and got it right
        
             
        
        
        
The answer is B. celiac disease. Celiac disease is an immune disorder. When someone with the disease eats any food containing gluten, the immune system creates antibodies and gets rid of the gluten but at the same time attacks the small intestine.