The correct answers are the following:
A.3 Social criticism. In this excerpt, the author engages in social criticism because he analyses injustices and the condition of the society. During the French revolution, people were in a sorrowful state.
B.2 A critical. The author has a critical tone. The author expresses the disillusionment with society.
C.3 Realist. The novel is written in a realist style. This style is used to depict and criticize injustice. The author presents accurate depictions of the social conditions at that time.
Answer: A) Playful.
Explanation: the mood of a character in a story is the attitude of the character towards a situation of another character. In the given excerpt from "Mending Wall" the speaker has a playful mood towards his neighbour and the situation where he was asked to build a wall, and he doesn't understand what is the point. To express his point of view he asks questions and he has a playful attitude.
The answer is "an appeal to moral responsibility."