Enthuware

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public class TestClass
{
  public static void main(String args[])
  {
    B b = new C();
    A a = b;

    INSERT CODE HERE

  }
}
class A {
    void a(){ System.out.println("a"); }
}
class B extends A {
    void b(){ System.out.println("b"); }
}
class C extends B {
    void c(){ System.out.println("c"); }
}
[code]

What can be inserted in the above code?

The option:[b] if (a instanceof A a1) a1.a();[/b] will compile and run as expected.