Which Statement BEST Describes What It Means for the Acid-Base

Multiple Choice

Which statement BEST describes what it means for the acid-base reaction between acetic acid and water to be in equilibrium? CH₃COOH + H₂O ⇌ CH₃COO^- + H₃O⁺

A) The mass of acetic acid and acetate is equal.
B) The number of moles of acetate equals the number of moles of acetic acid.
C) The number of moles of hydronium equals the number of moles of water.
D) The forward and reverse reactions proceed at the same rate.
E) The reaction is balanced.