Choice C is the best answer. The narrator notes that Lady Carlotta decided not to interfere when one of her "most eloquent exponents" was stuck in a tree because an angry boar was nearby (lines 14-22"none ...lost"). This "eloquent expo-nent" was a woman who often criticized Lady Carlotta for interfering in other people's affairs. Lady Carlotta's decision to "put the doctrine of non-interference into practice" (to not help her female acquaintance who was "besieged" in a tree) suggests that Lady Carlotta has a sense of humor.
Choices A, B, and D are incorrect because the description of how she "put the doctrine of non-interference into practice" does not suggest that Lady Carlotta is deceptive or cruel, or explain a surprising change in her behavior.