The answer would be C.
Since this isn't a flashback, first person, or doesn't lead to anything stressful.
It uses a lot of different words to add on the the terror of the "Death swamp," such as ooze, desperate, hopeless, or even viciously.
If you want to know whether that sentence is punctuated correctly, then you are right - it is.
You need to have a comma after the word range, because that is where the dependent clause ends, and there should be no comma before the conjunction and.
D. It does not have a verb and it is not a complete thought
