It's been a while since I read the Crucible but I think its C. Proctor rejecting Abigail.
The main difference is that third person limited happens when the story is told from a character’s perspective, while a story in third person omniscient is told by a narrator that is external to the story (i.e. not a character).
This last regret is made so bitter to Harry because, as he admits, it is his own fault he has not adequately exercised his great talent: “He had destroyed his talent by not using it, by betrayals of himself and what he believed in.” In a strange parallel, it is also Harry’s fault that he developed gangrene; by not using iodine on his scratch, he allowed it to become septic and is therefore to blame for his impending death.
Viewed in this light, Harry’s predicament is self-inflicted, and is therefore a fitting punishment for his repeated acts of self-betrayal over the years. The lingering question of the story is how Harry’s situation is resolved
C) They foreshadow the plot
We get an idea that the poem will be about how these 'three meet again' after having passed all their personal tribulations, 'when the battle's lost and won'.
