Which of the Following Statements Is True as It Relates

Which of the following statements is true as it relates to acid-base balance?

A) Renal mechanisms for correcting an acid-base imbalance are less rapid than respiratory mechanisms, but they continue to function until pH has been returned to a normal or near-normal range.
B) pH provides an accurate measure of serum bicarbonate and carbonic acid levels.
C) The acid-base buffer systems of the body consist of a weak acid and strong base.
D) The body uses respiratory compensatory mechanisms to prevent large changes in pH resulting from respiratory disease.