The war did not terminate until the fifth year of Aahmes' reign. Its result was the complete defeat of the invading hordes which had held Lower and Middle Egypt for so long, and their expulsion from Egypt with such ignominy and loss that they made no effort to retaliate or to recover themselves It is thought that these captives were so numerous as to become an important element in the population of the eastern Delta, and even to modify the character of the Egyptian race in that quarter. --George Rawlinson, How the Hyksos were Expelled from Egypt, 1881

Because this description of Egyptian history was written by a non-participant, it would be considered an example of

A) a biased source.
B) a primary source.
C) a tertiary source.
D) a secondary source.