The answer is C: Moving through the darkness.
The fact the question is asking about the adventures of a guide dog or the blind entails that it probably is a form of narrative, fiction or otherwise, which means it must be written to appeal to a reader´s fancy. So the title you should be looking for in the answer is one that is enticing or captivating at first glance, in a narrative sense. Also, semantically, and considering the reason stated previously, answer C is the only one that is interpretatively connected to a guide dog or the blind narratively.
Answer:
4. She wants to make her little sister happy.
Explanation:
I am answering this to the best of my knowledge. This is because the excerpt you uploaded is not complete for an expert to see.
But Option 4 seems to be the correct answer. Since Elizabeth went straight to the doll, that shows she loves dolls and if she must be happy then the narrator must get the doll for her. So, I believe that the narrator can only use her prize money to purchase the doll for Elizabeth in order to make her happy. We can always sacrifice so much in order to make the people we love happy.
So, I believe that Option 4 is the correct answer.
C, I think the answer is C. Good Luck!!