Acetic acid dissociates as$C{H}_{3}COOH\rightleftharpoons C{H}_{3}CO{O}^{–} + H^{+}$

 If a little amount of sodium acetate is added to its aqueous solution

  The reaction, $C{H}_{3}COOH\rightleftharpoons C{H}_{3}CO{O}^{–} + H^{+}$

Acid dissociation is suppressed, and the reaction moves backward if acetate is introduced.

Therefore, the correct answer is option (C) The acid dissociation is suppressed.