After Several Therapeutic Encounters with a Patient Who Recently Attempted

After several therapeutic encounters with a patient who recently attempted suicide, which occurrence should cause the nurse to consider the possibility of countertransference?

A) The patient's reactions toward the nurse seem realistic and appropriate.
B) The patient states, "Talking to you feels like talking to my parents."
C) The nurse feels unusually happy when the patient's mood begins to lift.
D) The nurse develops a trusting relationship with the patient.