Hope this helps!
(It didn’t let me add the text so I had to write it in my notes)
In this situation, Huck is trying to be impressive. He is trying to get the point across that he is funny and "cool". This lie is not only the one of a kind for Huck, but also one where he tries to push his reputation past its limits.
The answer is B...knowing about her heart condition develops her character, this in turn makes her later death believable because she has been characterized as someone with a fragile heart.
D because it combines the sentences correctly. I think, I'm puzzled between d and a but I really do think its d. :) Hope this helps!