To show the difference between two things and to emphasize a certain point
First, summarize what is happening in the story. A country mouse invites his city mouse friend for dinner. The city mouse does not enjoy his dinner, so he invites the country mouse to his house. They cant eat because they are constantly in danger.
Answer:
I think the answer is D, the narrative will change depending on narrator's tone and point of view
After Paul ate too much ice cream, his stomach began to hurt.