The correct answer is D. Marriage restricts one's freedom. This is because of the fact that even though her husband was not a bad man who beat her up or something similar, she was still kind of happy when she heard he died, because she would get to live her life as a free woman, instead of a housewife. This is why it was considered to be a controversial story when it came out.
Polygamy began to end when agricultural development and settling got introduced. During the nomadic non-agricultural period, polygamy was common and people were not tied to a single person.
C) It was recognized as a persuasive statement of rights and grievances.
The scene would be called a comedic relief scene, but if it is a specific character the character would be called the comic relief.