Give the reactivity in the decreasing order of the following nucleophiles towards nucleophilic addition reaction with compound A $\left({\mathrm{F}}_3\mathrm{C}-\equiv -{\mathrm{CF}}_3\right)$.

$$\begin{gathered} \text{ (I) }{\mathrm{CH}}_3{\mathrm{O}}^{-} \left(\mathrm{II}\right) {\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{O}}^{-} \\ \text{ (III) }{\mathrm{CH}}_3{\mathrm{COO}}^{\ominus }\text{ (IV) }{\mathrm{CH}}_3{\mathrm{SO}}_3^{\ominus } \end{gathered}$$

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