Which of the following most logically completes the argument?
Sviatovin is a medieval Moringian text whose author and exact date of composition are unknown. However, the events in the life of Prince Sviatov that the text describes occurred in 1165, and in the diagram of Sviatov's family that accompanies the text his father, who died in 1167, is identified as still living. Thus Sviatov must have been written between 1165 and 1167, assuming that ________.
【选项】the life of Prince Sviatov is not the subject of any other medieval Moringian texts
Sviatovin is a medieval Moringian text whose author and exact date of composition are unknown. However, the events in the life of Prince Sviatov that the text describes occurred in 1165, and in the diagram of Sviatov's family that accompanies the text his father, who died in 1167, is identified as still living. Thus Sviatov must have been written between 1165 and 1167, assuming that ________.
【选项】the life of Prince Sviatov is not the subject of any other medieval Moringian texts
