Depends on how major or minor the errors are. If the errors are due to lack of knowledge then it isn't a sign of progress but if less errors are being made and they are small ones progress may be shown.
To me, it is because a wide range of people can post their opinions, views, lives and any personal opinion with anyone they'd like. Also it is a source for entertainment and a connection with friends and family.
A allegory is a story in which the characters, objects, and plait events represent abstract concepts, having more than one layer of meaning. During research, I noticed many people put down fable for this exact question. That will be wrong. A fable has animals, creatures, and plants as characters. The correct answer will be C, allegory.