Answer:
Both C and D
Explanation:
They are the same answer and there are only two options for the answer so I would just put both as the answer. these options are true so, they should be correct. The question is a little confusing so I'm sorry if this doesn't help much!
When the immune system attacks itself.
C should be the answer because in that example he is not prepared nor is his flexible easily flexible by him being out at the movies on a weekend that he is on call. It shows the importance of needing to be flexible and easily adaptable in case of emergency.
In this case your answer would be
A - <span>Osteoporosis</span>
