Answer:
the spanish flu book thingy i cant remember the title
Explanation:
Tell me about it later, I’m busy right now. :)
The answer is guilt is what he felt
There are many circumstances such as
1. Challenging upbringing
2. A series of bad/unfortunate events that affect the life of the person
3. Loss of a person
4. Mental illnesses
5. Bad health
6. Bitterness
and more!