The correct answer is D, as dwarves and elves are found in Norse mythology.
The Norse mythology includes everything related to the religion, beliefs and legends of the Germanic Scandinavian peoples. It is the best preserved version of the ancient Germanic mythology, common to all Germanic peoples.
According to the Norse mythology, the dwarves were a special race, for they evolved from the worms that ate the corpse of Ymir, who was killed by the gods at the beginning of time; they lived under the earth (Svartalfheim) and their main occupation was mining and metallurgy. In addition, they possessed the hidden and sacred wisdom that allowed them to forge magical weapons for heroes and very powerful objects for the gods.
The elves in the Scandinavian era formed two groups: the elves of light (ljósálfar), who live in the sky and the black or dark elves (svartálfar, dökkálfar), who lived next to the dwarves.