【单选题】

Which nursing measure would be most effective in helping the client cough and deep breathe after a cholecystectomy
A．Having the client take rapid, shallow breaths to decrease pain.

B．Having the client lay on the left side while coughing and deep breathing.
C．Teaching the client to use a folded blanket or pillow to splint the incision.
D．Withholding pain medication so the client can be alert enough to follow the nurse's instructions.