下面哪份代码 (Java) 最接近对 Segment 的描述? A public class Segment implements Graphics { privatc void Draw(); public Point ptStart ; public Point ptEnd ; } B public class Segment extends Graphics { public void Draw(); private Point ptStart ; private Point ptEnd ; } C public class Segment implements Graphics { private Point ptStart ; private Point ptEnd ; public void Draw(); } D public class segment implements graphics { public void Draw(); private Point ptStart ; private Point ptEnd ; } A.B.C.D. D