public class A extends Thread {  A（） {  setDaemon（true）；  }  public void run（） {  （new B（））.start（）；  try {  Thread.sleep（60000）；  } catch （InterruptedException x） {}  System.out.println（“A done”）；  }  class B extends Thread {  public void run（） {  try {  Thread.sleep（60000）；  } catch （InterruptedException x） {}  System.out.println（“B done”）；  }  }  public static void main（String[] args） {  （new A（））.start（）；  }  }   What is the result？（）  

• A、 A done
• B、 B done
• C、 A done B done
• D、 B done A done
• E、 There is no exception that the application will print anything.
• F、 The application outputs “A done” and “B done”， in no guaranteed order.