Read the following context and answer the question.
Context: Something about how it helps their arthritis . And I did n't ask him if it was possible that Devon could ever do agility again but it sounds like he might be able to at least do jumpers courses once he 's weaned off it . Oh , and the Cephalexin he 's on is for the horrible nasty pustules all over his stomach because I let him play in the creek .
Question: Why might someone want to help their arthritis ?
Answer:


None of the above choices .