 The principles debated included (A) larger reserves are better than smaller ones, (B) a large reserve is better than a few small ones of the same total area, (C) several reserves close to one another are better than several further apart, (D) when there are several reserves they should be grouped equidistantly rather then linearly, (E) reserves connected by corridors are better than unconnected ones, and (F) compact shapes are better for minimizing boundary length (1975b: 143–5).