One purpose of satire is to
a. prepare readers for an important event.
b. teach readers something about society.
c. stand in or represent a more abstract concept.
d. show the characters' issues are of no consequence.

The correct answer is B. Teach readers something about society.

Explanation:

Satire is mainly a genre of literature or literary technique that consist on ridiculizing vices and other negative aspects found in society or individuals and in this way shame society, organizations or individuals to indicate a need of improvement. Due to this, besides entertaining, satire aims at doing constructive criticism on specific negative aspects of society. This implies one of the purposes of satire is to teach readers something about the society by ridiculizing negative aspects of it.

that's conceptually impossible.

if i wrote it, it wouldn't be a 'shakespeare' sonnet.