Capital costs for a defender are higher than the operating costs, and the annual operating costs are gradually increasing. Capital costs for a defender are less than the operating costs, and the annual operating costs are monotonically declining. Capital costs for a defender are less than the operating costs, and the increase in annual operating costs is not monotonic. Capital costs for a defender are small compared to the operating costs, and the annual operating costs are gradually increasing. Capital costs for a defender are higher than the operating costs, and the increase in annual operating costs is not monotonic. What are the two conditions behind the One Year Principle?