The best choice would be C. She is arrogant. Her tone in which she speaks sounds snobby in a way. We can’t assume that she is dishonest she possibly is a genius. I don’t think she is nervous for she speaks very boldly. Her statements never showed in any way how genius she was. So yes C is the best choice.
It influences a lot because, as the story is evolving so is the setting.
It matters because, without setting there's no story.
I believe that setting is the most important part of a story because, it tells u many things..
For Example :
TIME /PLACE /BACKGROUND OF STORY /AND WHERE SOMETHING TAKES PLACE..
in the house, park, pools, hotels, movies, Etc....
Yellow Journalism means journalism that is over exaggerated and have a lot of sensationalism. For example, this can include newspapers that have big and click bait kind of stuff to make someone want to read the article/newspaper. This technique also raise the sales by a lot.
Best of Luck!