A nurse is caring for a client who had a cholecystectomy with common bile duct exploration and placement of a T-tube 24 hours ago. The nurse observes large amounts of bilious drainage from the T-tube. Which action should the nurse take?

a) Administer pain medication.
b) Clamp the T-tube for two hours.
c) Continue to monitor the drainage.
d) Lower the head of the bed.