Narrator feels saddened because "A flow of disappoint rushed across my mind." The creature felt amused because "He came straight up to me and laughed into my eyes."
Hope this helps, if you have any other questions please do ask :)
Answer:
tell her that you just wanted to get the infromation and wrote it down in your words but the article in the internet is similar because you unconsciously wrote it similar it to the article since you had taken references from it
D because it includes more information than the others and is more professional