A patient who had a motor vehicle crash 2 days ago is experiencing pain and is receiving patient-controlled analgesia (PCA). Which assessment finding indicates effective pain management with the PCA?

The patient has sufficient medication left in the PCA syringe.

The patient is sleeping and is difficult to arouse.

The patient rates pain at a level of 2 on a 0 to 10 scale.

The patient presses the control button to deliver pain medication.