because C can cover B and A, and A can cover nothing the routes from zone A into C or B are horribile, there is a bottleneck into C, all routes lead to the same place and they're easily covered by a single person standing on the ship (or building or whatever the fcuk those things are in the back of C lol) A route into B you're on the low ground, or you have to go through the cave and again, either route is easily covered by 1 person standing on the [i]other[/i] ship or on B flag itself. A is at a real disadvantage on that map