The correct answer is C. Grete stops caring for Gregor and decides the family must get rid of him.
Step-by-step explanation:
"The Metamorphosis", which is the most famous literary work by the writer Franz Kafka, tells the story of Gregor Samsa as one day he founds his body has changed and transformed into an insect which represents multiple challenges and changes in the life of the main character. Because of this, in this novel, Kafka explores certain themes (message the author wants to convey to the audience) such as alienation and isolation mainly through the actions of Gregor and the people that surround him.
In the case of isolation, Kafka uses the relationship between the main character and his family to depict this theme as before the transformation of Gregor and he provided to the family they treated in a different way, but once he is an insect and cannot communicate with them the family begins despising Gregor and even his sister Grete who help him to feel better with the transformation believes he is a burden and isolate him. Thus, an example of the way in which Kafka establishes a theme of isolation is that "Grete stops caring for Gregor and decides the family must get rid of him" as the actions of the characters show to the reader the way the character was left alone as it became a burden and was not a provider for the family anymore, which sends a message to the audience (theme) about isolation.