An island has three kinds of inhabitants: knights who always tell the truth, knaves who always lie, and spies who can either lie or tell the truth. You encounter three people, A, B, and C. You know that one of these people is a knight, one is a knave, and one is a spy. Determine who the knight, knave, and spy are if A says I am the knight, B says A is not the knave, and C says B is not the knave. Explain your reasoning. (This is a Logic Puzzle problem. Refer to Examples 7 and 8 to answer this question.)