The reason being that each character embodies a quality and portrays its characteristics in such a straightforward manner that is impossible for the reader not to associate the character with the idea the author is portraying.
<em>D. The association of each animal with quality, such as a cat with refinement, enables the reader to think clearly about those qualities.
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<u>Explanation:</u>
According to the characters, the theme is evident. This is because the animals portray their roles in a straight forward way. This, therefore, makes it impossible for the reader to bring the characters together with the idea that the authors are showcasing.
For instance, the author says that the cat and the donkey lie while there was only a bear in the mirror. All other animals followed however what they saw was their images in the mirror without realizing.