Answer:
D. It makes Gregor's parents seem more important.
Step-by-step explanation:
This question is about "Metamorphosis" written by Kafka, which tells the story of Gregor's transformation into a giant insect.
The relationship between Gregor and his parents is not very good, as it is a cold and very impersonal relationship, where Gregor does not have family and emotional support. This makes Gregor's parents less important in the story and provokes little public interest, for this reason, the author decides to present them in a more impersonal way as "the father" and "the mother." However, Gregor's transformation makes his family more important to the story, as he becomes dependent on the family. This increases the importance of his parents in the story, making the author present them in a more specific and punctual way, highlighting their importance in Gregor's life. For this reason, the author introduces them as "his mother" and "his father."