What Statement Does NOT Describe the Methods by Which Chemical

What statement does NOT describe the methods by which chemical buffer systems operate to maintain pH?

A) When a strong acid is added to a solution, the weak base of the buffer system binds the released hydrogen ions and removes them from solution.
B) Buffer systems consist of a weak acid and its conjugate weak base which function to resist large swings in pH.
C) When a strong base is added to a solution, the buffer system's weak acid releases its hydrogen ions to bind the base ions.
D) All excess hydrogen ions are removed from the body in the urine.