Final answer:
In the short story "Everything that rises must converge," Character A is flat and Character B is round.
Step-by-step explanation:
A round character is one that is three-dimensional and undergoes significant development and change throughout a story. A flat character, on the other hand, is one that lacks depth and remains unchanged throughout the story. In the context of "Everything that rises must converge," an example of round and flat characters would be:
D. Character A is flat and Character B is round.
Character A would be a flat character, representing a particular idea or trait without much complexity or development. Character B, on the other hand, would be a round character, experiencing significant changes and embodying a multi-dimensional personality.