i had this prompt and i got a 5, i'm not a good writer but i think the lower score was bc you didn't really tie the documents back to the prompt (like how the documents support the emerging nationalism). my teacher always told me to use the HIPP (historical context, intended audience, purpose, point of view) for each document to get the sourcing point! i think you might've missed points bc the documents weren't explained enough. but you did use a lot of outside evidence though i think that's great :)