Final answer:
Miss Darcy, also known as Georgiana, is Mr. Darcy's sister and an important character in Jane Austen's Pride and Prejudice.
Step-by-step explanation:
Miss Darcy, also known as Georgiana, is A) Mr. Darcy's sister. In Jane Austen's novel Pride and Prejudice, Miss Darcy is an important character and plays a significant role in the story. She is described as a young woman who is reserved and shy, but also kind-hearted and well-educated. Miss Darcy's character development throughout the novel is influenced by her relationship with Mr. Darcy and her interactions with other characters.