TheInternationalAssociationofLighthouseauthorities(IALA)buoyagesystem“A”usessometypesofmarkstodistinguishsafenavigation?Whichtype(s)does(do)notbelongtothesystem?（） A: lateralmarksandcardinalmarks B: safewatermarks C: isolateddangermarksandspecialmarks D: dangerouswatermarks