Answer:
The monkey's paw grants the owner three wishes. Sergeant-Major Morris throws the paw into the fire, but Mr. White quickly snatches it from the flames. Morris warns the family of its power and suggests they throw it back in the fire.
C) The phrase creates an image of people walking through several inches of trash, which implies a filthy environment. The entire text is talking about how dirty it is and how it is hard to walk through with all the trash and filth in the way.
The subject of a topic sentence is called the controlling idea.