Which word in the sentence is an adverb?

Easy.. adverbs tell you when, where, how, how much, and/or how often?

First 3 answer choices are easily eliminated. That leaves us with answer choice D. Badly.

explanation: yee yee

as for symbolic actions, the narrator's tearing down the wallpaper in an attempt to find the "woman" in the wallpaper represents her struggle to retain or regain her sanity.   the wallpaper has been part of her confinement and by her tearing it down, she is freeing herself from that confinement.