Answer:
B. To understand the differences in perspective between the authors or artists.
Step-by-step explanation:
Literary critics tend to compare different authors who have written about the same subject matter in order to assess the interpretative and literary depth that each author´s perspective and quality brings to a broader discussion about that subject. The purpose is not to evaluate which writer is better or worse, but rather, analyze their treatment of the subject matter in order to determine such subject and evaluate it and study it according to the dimensions that these writers present; dimensions that without these writers contributions, would perhaps be alien to humanity.