A.Ⅱ+Ⅲ B.Ⅰ+Ⅱ+Ⅳ+Ⅴ C.Ⅲ+Ⅳ+Ⅴ D.Ⅰ+Ⅱ+Ⅲ+Ⅳ
A.0.3~0.5R B.0.4~0.7R C.0.5~0.8R D.0.6~0.9R
A.0.4R B.0.5R C.0.6R D.0.7R