多选题 Given:
2. class Feline { }
3. public class BarnCat2 extends Feline {
4. public static void main (String[] args) {
5. Feline ff=new Feline();
6. BarnCat2 b=new BarnCat2 ();
7. // insert code here
8. }
9. }
Which, inserted independently at line 7, compile? (Choose all that apply.)

A、 if(b instanceof ff) System.out.print("1 ");
B、 if(b.instanceof(ff)) System.out.print("2 ");
C、 if(b instanceofFeline) System.out.print("3 ");
D、 if(b instanceOf Feline) System.out.print("4 ");
E、 if(b.instanceof(Feline)) System.out.print("5 ");

【正确答案】 C

【答案解析】