"Why" is the question to ask to help identify the reason for an event that happens in a historical text.
If you ask "why" an event happened, you will get to better understand the reasoning around it, what prompted the event, and some of the personal/political emotions or decisions that surrounded the event.
I'd say it's D) Indirect object, but I'm not sure, so don't take my word as gospel :)
Answer: Theme
Explanation:
The theme of a story is the main idea and the message the author is trying to get across.
To prepare sanctions; warn
