A singular proper noun is creating a possessive form of a proper noun, no? It follows the same rules as a common noun, so your answer is D.
Answer: I would use a dictionary, but that wasn’t a choice; She should reread the beginning and ending of the story to see if her prediction was correct.
Explanation: IF she reread only the sentence with the unknown word to see if her guess makes sense, she could still err, but reading before and after should give a better idea if it was correct.
Answer:
I want to say its d, but i'm not sure what the question was because it wasn't stated in the information you provided.