Answer:
It reveals the characters’ thoughts and feelings about
Now, this sentence wasn't complete, but it seems like the most obvious choice. The dialogue didn't tell us why the narrator does not have enough money to buy groceries, nor does it explain how the experience in the store has shaped the identity of the author. It might provide a little background information that helps the reader get to know the characters, but for now, option D seems the most fitting. You can use context clues and experience to hypothesize that it might be "it reveals the characters’ thoughts and feelings about the situation."
Hope this helped!