设有如下代码：interface IFace{ }class CFace implements IFace{ }class Base{ }public class ObRef extends Base{ public static void main(String argv[]){ ObRef obj = new ObRef(); Base b = new Base(); Object obj1 = new Object(); IFace obj2 = new CFace(); //Here }}则在 //Here处插入哪个代码将不出现编译和运行错误。 A.b=obj; B.obj1=obj2; C.obj=b; D.obj1=b;

设有如下代码：interface IFace{ }class CFace implements IFace{ }class Base{ }public class ObRef extends Base{ public static void main(String argv[]){ ObRef obj = new ObRef(); Base b = new Base(); Object obj1 = new Object(); IFace obj2 = new CFace(); //Here }}则在 //Here处插入哪个代码将不出现编译和运行错误。 A.b=obj; B.obj1=obj2; C.obj=b; D.obj1=b;

正确答案：ABD