What Is the PH of a 0

What is the pH of a 0.45 M solution of sodium acetate, CH₃COO ^- Na⁺?
K _a(CH₃COOH) = 1.8×10 ^{- 5}. You may want to complete the following table before getting started. A simplifying assumption would be valid here. CH₃COO ^- Na⁺ CH₃COOH OH^{1 -} Initial Change @ equilibrium

A) pH = 2.54
B) pH = 4.80
C) pH = 9.20
D) pH = 9.55
E) pH = 11.46