In Charlotte Perkins Gilman's short story " the yellow wallpaper, " why is the narrator obsessed with the designs in the wallpaper? A. As she slowly goes insane from isolation, she begins to imagine all kinds of things about the wallpaper.

B. Because she cannot sleep at night, the narrator imagines that the wallpaper comes alive, and so she entertains herself that way.

C. Once she learns that her husband is keeping her locked up, her anger causes her to see things that aren’t there.

D. As the narrator begins to study the room, she sees that the wallpaper actually tells a story