Which Statement Is Incorrect

Which statement is incorrect?

A) A chemical buffer system consists of a pair of substances involved in a reversible reaction, one that can yield free H⁺ and one that can bind with free H⁺.
B) A chemical buffer system minimizes changes in the pH of a solution when an acid or base is added to or removed from the solution.
C) Buffers respond to pH changes in about three minutes, but then can be very effective in preventing dramatic pH changes.
D) A buffer system cannot actually eliminate hydrogen ions from the body.
E) Buffer systems act according to the law of mass action.