Which best expresses the symbolism of the arkenstone

The Arkenstone is an important part of the book "The Hobbit". It is a stone that was under a mountain in the novel for years and years. The stone shines a light onto anything that needs light. The symbolism of the stone is that it represents a character, Thorin, and his greed that is contained in the novel. It represents Thorin's upbringing and childhood as well. Further, the stone represents a level of peace that is maintained between the dwarves in the novel.

Ibelieve the answer is d