An ungrounded receptical outlet is to be placed by a ground fault circuit interrupter receptical. There is no provision for grounding within the receptical box. Which of the following is not an option when this receptical is being placed?

An ungrounded receptical outlet is to be placed by a ground fault circuit interrupter receptical. There is no provision for grounding within the receptical box. Which of the following is not an option when this receptical is being placed?