Which Observation Requires an Intervention of a New Graduate Nurse

Which observation requires an intervention of a new graduate nurse by her preceptor?

A) Administering a medication after checking the patient's name and birth date.
B) Leaving patient room without charting vital signs.
C) Reporting a patient's change in level of consciousness to the nurse practitioner.
D) Checking the apical pulse on a patient receiving digoxin (Lanoxin) .