分析下列程序: class Super{ public int getLength() { return 4; } } public class ClassTest extends Super { public int getLength() { return 5; } public static void main(String args[]) { Super sooper=new Super(); ClassTest t=new ClassTest(); System.out.println(sooper.getLength()+","+t.getLength()); } } 该程序的输出结果是? A 4,4 B 4,5 C 5,4 D 5,5