Answer: The two adverbs are "so" and "clumsily"
Explanation: "So" is an adverb that modifies the adjective "nervous." It indicates the degree or intensity of nervousness. For example, it shows that the speaker was extremely nervous.
"Clumsily" is an adverb that modifies the verb "dropped." It describes how the action of dropping the notes was performed. It suggests that the speaker dropped the notes in an awkward or uncoordinated manner.