Chapter 8, Problem 153QP

Which of the following has a Lewis structure most like that of ${\text{SO}}_3^{2-}?$

$\begin{array}{l}\text{A}\text{.}{\text{SO}}_{\text{4}}^{\text{2}-}\\ \text{B}\text{.}{\text{NO}}_{\text{3}}^{-}\\ \text{C}\text{.}{\text{SO}}_{\text{3}}\\ \text{D}\text{.}{\text{NF}}_{\text{3}}\\ \text{E}\text{.}{\text{CO}}_{\text{3}}^{\text{2}-}\end{array}$

Why does each of the other species have a different Lewis structure?