How Will the Nurse Assess the Flank Area of a Patient

How will the nurse assess the flank area of a patient with pyelonephritis for tenderness?

A) Push gently into the two lowest intercostal spaces.
B) Palpate along both sides of the lumbar vertebral column.
C) Position one hand flat at the costovertebral angle ( CVA ) and strike it with the other fist.
D) Use two fingers to percuss the area between the iliac crest and ribs along the midaxillary line.