A
Not correct. She could have been using references to anything. Not all her references are from literature. Southern Bitter Wormwood is a reference to the wormwood plant which is medicinal in nature and it is very bitter.
C
Maybe. But there's a better answer. It's not her personality we are drawn to although it is quite bubbly if this passage is any kind of indication. It is the joy she takes in recognizing that Beowulf likes a good drink and he wanted her to join him and she was delighted by the invitation.
D
She could have been talking about anything that engaged her. It just happened to be mostly about the classics.
B
This is the best answer. C and D are close, but it really is B that we are attracted to. We have our eyes opened to the grand people in books. More than that we feel her joy in Beowulf, her polite tea conversation with Oliver Twist, her astonishing acceptance of the meaning of Sydney Carton's statement at the end of a Tale of Two Cities.
Because Twain's writing is very inspiring and encouraging
