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The correct option is C. The change in Gregor's and Grete's relationship is important to the plot of The Metamorphosis because Gregor would be in serious trouble if Grete no longer helped him because she is his only caregiver.
What is the main theme of the Metamorphosis?
The burden of obligation, alienation, exclusion, and sacrifice are the book's key themes. Responsibility's weight: Gregor was a wandering salesman before becoming a vampire to provide for his family. Following his release from that duty, Gregor begins to feel like a burden to his family.
The development of Grete and Gregor's friendship is a key plot point in The Metamorphosis because it demonstrates how Gregor's sister's personality and physical appearance altered throughout the course of the narrative in contrast to Gregor's own physical transformation into an insect.
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