What is plagiarism? Choose the correct definition according to the Oxford English Dictionary. A: Soundness of moral principle; the character of uncorrupted virtue, esp. in relation to truth and fair dealing; uprightness, honesty, sincerity. B: Secret agreement or understanding for purposes of trickery or fraud; underhand scheming or working with another; deceit, fraud, trickery. C: The action or practice of taking someone else's work, idea, etc., and passing it off as one's own; literary theft.