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Which of the following most logically completes the argument? The title page of a book printed in 1960 bears a handwritten quotation from a twelfth-century Norse treaty below which appears the date March 1961 and the name of the scholar Lars J. Only three manuscripts of the treaty existed in 1961, and a printed version was not published until 1970. Although it is conceivable that Lars saw one of the three manuscripts, it is more probable that the title-page inscription is a forgery, since __________.