What is the equilibrium constant expression, \({K_{\text{c}}}\), for the following reaction?

\[{\text{2}}{{\text{H}}_2}{\text{S(g)}} \rightleftharpoons {\text{2}}{{\text{H}}_2}{\text{(g)}} + {{\text{S}}_2}{\text{(g)}}\]

A.     \({K_{\text{c}}} = \frac{{{{{\text{[}}{{\text{H}}_2}{\text{S]}}}^2}}}{{{{{\text{[}}{{\text{H}}_2}{\text{]}}}^2}{\text{[}}{{\text{S}}_2}{\text{]}}}}\)

B.     \({K_{\text{c}}} = \frac{{{\text{[}}{{\text{H}}_2}][{{\text{S}}_2}{\text{]}}}}{{{\text{[}}{{\text{H}}_2}{\text{S]}}}}\)

C.     \({K_{\text{c}}} = \frac{{{\text{2[}}{{\text{H}}_2}{\text{]}} + {\text{[}}{{\text{S}}_2}{\text{]}}}}{{{\text{2[}}{{\text{H}}_2}{\text{S]}}}}\)

D.     \({K_{\text{c}}} = \frac{{{{{\text{[}}{{\text{H}}_2}{\text{]}}}^2}{\text{[}}{{\text{S}}_2}{\text{]}}}}{{{{{\text{[}}{{\text{H}}_2}{\text{S]}}}^2}}}\)

D