Which Arrangement Is in the Correct Order of Decreasing Radii $\mathrm{As}^{3-}>\mathrm{Br}^{-}>\mathrm{K}^{+}$

Multiple Choice

Which arrangement is in the correct order of decreasing radii?

A) $\mathrm{As}^{3-}>\mathrm{Br}^{-}>\mathrm{K}^{+}$
B) $\mathrm{F}^{-}>\mathrm{Mg}^{+}>\mathrm{Cs}$
C) $\mathrm{Na}^{+}>\mathrm{Cs}^{+}>\mathrm{I}^{-}$
D) $\mathrm{Be}>\mathrm{Ba}^{+}>\mathrm{O}^{2-}$
E) $\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{K}^{+}$