B. Offer criticism on the dystopia itself
The closest would be B. Amiable, since it means nice, happy, genial. Empathetic means the could sympathize, euphonious means it's a good sound, and sentimental means feeling(s)
The plot is about how middle schoolers evolve. The setting of the school shows the everyday life of the main middle schooler going through the struggles of being a preteen and the preparation for high school. (If this doesn’t help google the plot of the story and think about the setting and the the relation.)