Answer:
A = She is upset because she realizes that she craves love, not life in the city.
B = "For she knew now that it was not the great city and its crowds of people she had so eagerly sought; but the pleasant-faced boy, who had made her picture that day under the mulberry tree."
Explanation:
You take a story and explain the entire thing with only a couple paragraphs, and you don't want to give away any special details that way a person can know a little about the book and want to read it. Like a "A dog and His Ball" is about a lost dog who doesn't have a family and finds an old ball to play with. You would put this on the back of a book and then people would be drawn to read this book. ( I just made something up so it may not make sense sorry.)
I'm not really sure I understand what you are asking, but I tried to answer the best I could, please let me know if this isn't what you meant.
Answer:
What is the poem ?
please give name or link to the poem.