The answer would be D. "That experience has led her to understand what she is made of." This is because the theme is the message that is given through reading the story. When you understand what you are made of you are learning a lesson.
Let's number them okay. Since I can't see everything that is said in the picture I will have to assume it is either number 3 or 4.
Home eventually comes to mean family for Walter
Your answer is A since it is giving details