The correct answer is D. There is a change in mood from the quatrains to the final couplet. This is common in the English sonnet that the final couplet is used to change the mood and add new meaning to what was previously said, thus being a sort of a peak for the sonnet.
The best way to learn about Annie is to follow her for a day. She lives in New York. It is where she was born, and she is proud of the city is the best choice :P