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.