A.I am an object array

B.The compilation fails due to an error in line 1.

C.I am an array

D.I am an object

A.sb.removeAll();

B.sb.delete(0, sb.length());

C.sb.delete(0, sb.size());

D.sb.deleteAll();

A.2,34,34,5

B.2,34,54,5

C.2,54,54,5

D.2,34,54,3

A.void walk(){}

B.private void walk(){}

C.public abstract void walk();

D.abstract void walk();

E.protected void walk(){}