Thanks for your responses so far! Could you list the conclusion and the premise of the stimulus? Also, what do the words "setting" (in stimulus) and "set" (in choice C) mean in this context?
前题:Its idioms and spellings would appear to British readers to be strikingly American
结论:Conflict with the novel's setting
关于Setting in (C): You've said it. It is the language and cultural context among which the novel laid out, with which the idioms and spelling have so many things to do.