The correct answer is C. The pattern of the wallpaper
Explanation:
"The Yellow Wallpaper" is a famous short story that focuses on a woman who is placed on an old house temporarily as part of a treatment for her depression. During this story, the woman (who is also the narrator) explains her impressions about the yellow wallpaper of the room. Indeed, she develops some fascination for the pattern of the wallpaper and even believes there is a woman behind the wallpaper. Therefore, in this story, the part of the room that commands most of the attention of the narrator is the pattern of the wallpaper.