If the equilibrium constant of $CH_3COOH + H_2O \rightleftharpoons CH_3COO^{-} + H_3O^{+}$ is $1.8 \times 10^{-5}$,what is the equilibrium constant for the reaction $CH_3COOH + OH^{-} \rightleftharpoons CH_3COO^{-} + H_2O$?
- A$1.8 \times 10^{-9}$
- B$1.8 \times 10^{9}$
- C$5.55 \times 10^{-9}$
- D$5.55 \times 10^{10}$
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