The nurse is collecting sterile sample for culture and sensitivity from a disposable three chamber water-seal drainage system connected to a pleural chest tube. The nurse should obtain the sample from which site on the drainage system?
A. Stopper port located above the water-seal level
B. Plastic tubing located at the chest insertion site
C. Rubberized port at the bottom of collection chamber
D. Tubbing located on the top of the suction chamber