A patient being treated for an MI has been transferred from the intensive care unit to a step-down ...

A patient being treated for an MI has been transferred from the intensive care unit to a step-down unit.
 
  She is anxious and uses the call bell as often as every 15 minutes, complaining or making a seemingly small request each time the staff member enters the room. Which indicator should staff focus on to monitor for the outcome of anxiety self-control? a. Patient monitors duration of anxiety episodes
  b. Patient sleeps 7 or more hours each night
  c. Patient has stopped using the call button
  d. Uses call button not more than once per hour