Answer:
The correct answer is C. The adverb phrase because of the siren modifies the word awakens.
Explanation:
Adverb phrases function as regular adverbs - their role in a sentence is to modify a verb. Here, the verb is 'awakens.' The phrase that modifies it is 'because of the siren.' The adverb phrase gives us a reason why the action of awakening happened.
A is incorrect because 'entire household' is a noun phrase.
In B, 'quickly awakens' is a verb phrase.
In D, 'the siren' is a noun.
