During a fire drill, the nurse enters a laundry room and a waste basket is marked as on "fire." The nurse activates the alarm, closes the laundry room door, and obtains a fire extinguisher and returns to the laundry room. Which action by the nurse shows that additional training is needed?

a) Activating the alarm
b) Closing the laundry room door
c) Obtaining a fire extinguisher
d) Returning to the laundry room