Select all that are true about buffers and buffer regions. Group of answer choices In a weak acid-strong base titration the buffer region is identified as the relatively horizontal area before the equivalence point Drastic changes in pH WILL be observed when adding acid or base to a buffer Drastic changes in pH WILL NOT be observed when adding acid or base to a buffer In a weak acid-strong base titration the buffer region is identified as the relatively horizontal area after the equivalence point Buffers consist of high concentrations of a weak conjugate acid-base pairs.