Respuesta :
The adverbial phrase in this sentence is A) for a moment. A phrase means that there is no finite verb, and adverb means that it denotes something (in this case, time).
B, C, and D cannot be correct because there is a verb there, which means it is a clause/fragment, but not a phrase.
B, C, and D cannot be correct because there is a verb there, which means it is a clause/fragment, but not a phrase.