A nurse is collecting data from a client who is postoperative. Which of the following findings should the nurse identify as objective data? (Select All that Apply.)

The client's current blood pressure is below their preoperative reading.

The client is reporting nausea.

The client's right calf is swollen and warm to the touch.

The client's urine output has been 150 ml over the past 3 hr.

The client states they are experiencing "extreme pain".