What Reaction Would Take Place to Limit the Change in PH

What reaction would take place to limit the change in pH when NaOH is added to a mixture of acetic acid (CH₃CO₂H) and acetate ion (CH₃CO₂^-) ?

A) H₃O⁺_(aq) + CH₃CO₂^-_(aq) $\rightarrow$ CH₃CO₂H_(aq) + H₂O_(l)
B) OH^-_(aq) + CH₃CO₂H_(aq) $\rightarrow$ CH₃CO₂^-_(aq) + H₂O_(l)
C) H₂O_(l) + CH₃CO₂^-_(aq) $\rightarrow$ CH₃CO₂H_(aq) + OH^-_(aq)
D) H₂O_(l) + CH₃CO₂H_(aq) $\rightarrow$ CH₃CO₂^-_(aq) + H₃O⁺_(aq)
E) none of the above