Read the following sentences from “Day of the Butterfly.”

“She began to unwrap the presents, with an air that not even Gladys could have bettered, folding the tissue paper and the ribbons, and drawing out books and puzzles and cutouts as if they were all prizes she had won. Miss Darling said that maybe she should say thank you, and the person’s name with every gift she opened, to make sure she knew whom it was from, and so Myra said, “Thank you, Mary Louise, thank you, Carol,” and when she came to mine she said, “Thank you, Helen.”

What was the author’s *main* purpose for including this description of Myra? A. A. to highlight her feelings about the gifts she received
B. to underscore the importance of using good manners
C. to show Myra’s displeasure in being the center of attention
D. to emphasize Myra’s ability to recognize the good in others