In the myth (story) of Daedalus and Icarus, the word lamented means the mix of sad and sorry feelings in Daedalus heart for Icarus' death, because was his son.
A important theme or reasons It would be letter B.
The writer can write the highlights differently or draw attention to them. Examples are adding more details, capitalizing, punctuation, and secluding it form minor details. Hope this helps! : )