Final answer:
Option (B), Elizabeth feels compassion towards Darcy when he apologizes and admits his faults in a sincere letter, which changes her perception of him and paves the way for her eventual change in feelings.
Step-by-step explanation:
Elizabeth feels compassion for Darcy when he proposes marriage to her primarily B) Because he admits his faults and apologizes. Within Jane Austen's novel Pride and Prejudice, Darcy's initial proposal to Elizabeth Bennet comes across as haughty and he inadvertently insults her family.
However, Elizabeth's perspective on Darcy begins to shift after he gives her a letter explaining himself, sincerely admitting his mistakes regarding his intervention in her sister Jane's relationship with Bingley, as well as revealing the truth about Wickham. This act of humility and Darcy's willingness to admit fault lead to Elizabeth developing a sense of compassion towards him.