Here's why:
* Adverbs modify verbs, adjectives, or other adverbs.
* "Scrupulously" tells us *how* something is done.
For example:
* She scrupulously followed the instructions. (modifies the verb "followed")
* He was a scrupulously honest man. (modifies the adjective "honest")
Let me know if you have any other words you'd like to identify!