If you need hep with your citations, it is recommended you follow the MLA format rules, as this is will likely be your go-to for much of high school essay writing and the like.
Therefore, I suggest using a works cited list, which is more convenient compared to citing each individual line.
In my opinion, the correct answer is B. <span>one adjective clause. This clause is "</span><span>which is perhaps the most famous border ever established by surveying methods". It modifies the subject ("The Mason-Dixon line"), providing an additional description for it.</span>
