Which of the Following Statements Are True of the Bicarbonate

Which of the following statements are true of the bicarbonate buffer system (Select all that apply) ?

A) This buffer system is found in the blood.
B) Buffers are chemicals that can create large changes in pH when needed.
C) A disadvantage of this system is that it works very slowly.
D) The weak acid part of the system is NaHCO3.
E) H2CO3 ionizes to HCO3- and H2.
F) When this buffer system buffers a strong base,water is formed.