Breaking down the passage, cont

@Reneel, Great question. In general, you always want to be looking for the conclusion of the argument, the support, and the relationship between the support. If you find that one or more phrases or sentences are neither being supported by anything nor supporting anything, then that's a strong indication that the phrases/sentences in question are background/context and not necessarily relevant to the argument. However, this information can sometimes be helpful, as it's sometimes used to set the stage for the argument. By setting the stage, I mean it's helping you to imagine the situation at hand. Does that make sense? Let us know if you have any other questions!`

still do not understand how the answer is C

If anyone could further explain please feel free to