For a S_N2 Reaction, Pick Out the Strongest Nucleophile from the Following

Multiple Choice

For a S_N2 reaction, pick out the strongest nucleophile from the following species:
A: $\mathrm{PhO}$
B: $\mathrm{EtOH}$
C: $\mathrm{MeCO}_{2}^{-}$
D: EtO
E: $\mathrm{H}_{2} \mathrm{O}$

A) A
B) B
C) C
D) D
E) E