Which of the following most logically completes the argument?
Aarne is an old Finnish artwork whose painter and exact date of composition are unknown. However, the painting portrays a riot thought to have taken place sometime between 1563 and 1567, and in the background of the scene stands a public building known to have been destroyed in 1565. Thus the riot depicted in the painting must have actually taken place between 1563 and 1565, assuming that _______.