Final answer:
Huck Finn exhibits responsibility and reasonableness in managing challenges described in chapters 10 and 12. His actions extend beyond mere immaturity, as he shows adaptability while navigating his life on the river and dealing with societal ties.
Step-by-step explanation:
When evaluating which inference about Huck Finn is best supported by chapters 10 and 12 of Adventures of Huckleberry Finn, it's clear that Huck demonstrates a blend of characteristics. However, given the scenarios presented in these chapters, it's reasonable to infer that Huck is resourceful and adaptive, which reflects a degree of responsibility. In chapter 10, Huck's actions in dealing with the situation with his father and the handling of the “dead” snake's mate showcase a mix of creativity and poor judgment—displaying both his resourcefulness and immaturity. By chapter 12, Huck and Jim's life on the raft is characterized by Twain's depiction of a seemingly idyllic freedom symbolized by the river and nature, yet a closer reading reveals that Huck remains entwined with societal norms, hinting at his ongoing development and responsibility rather than mere immaturity or confusion.
Despite exhibiting behaviors that could be interpreted as immature or confused, the gravity of Huck's situation and his response to it suggest that he is both responsible and reasonable in his approach to dealing with the challenges he faces. Thus, while Huck may have his shortcomings, within these chapters, his actions most strongly support the inference that Huck is responsible.