The difference in the way the authors show the frog prince's thoughts about the princess is B. The Enchanted Prince uses a chapter. The Frog Prince uses stage directions.
This refers to the use of a narrator in order to show the sequence of events in a story.
Hence, we can see that based on the given descriptions, we can see that from the narration of both the Enchanted Prince and the Frog Prince, there is the use of a chapter and stage directions respectively.
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