Given below is the plot of pH versus volume of NaOH added in an acid-base titration. The correct statements among the following are

A

Before the equivalence point, a series of buffer solutions determine the pH

B

The graph represents the titration of a strong acid with NaOH

C

At the equivalence point, hydrolysis of the anion of the acid determines the pH

D

After the equivalence point acid and salt buffer solution determines the pH