I’m not sure what the question is. “Come” would be the correct present tense for the sentence, but if you need a different word with the same meaning to replace it with, then you can use “arrive” instead.
I hope this helped, if not, then you can reply specifying what the question is.
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.
