Respuesta :
The participial phrase is a phrase that is started with words ending with -ing. It can be used as a noun or as an adjective used to modify the noun given. From the given above, the participial phrase used as adjective is the "barking loudly". Thus, the answer is letter C.
C) The dog barking loudly kept the neighbors up all night long. (i did the usatestprep and it is correct)