Respuesta :
Answer:
b.The adverb phrase because of the siren modifies the word awakens.
Explanation:
Because in the sentence the adverb phrase: "because of the siren" is providing information on what happened, they woke for a reason: "because of the siren" so it modifies the word "awakens". In other words, it lets you know why the action "awakens" affected the subject's. The subject is "The entire household".