What are the coefficients of ${{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}{\text{(aq)}}$ and ${{\text{H}}_{\text{3}}}{\text{P}}{{\text{O}}_{\text{4}}}{\text{(aq)}}$ when the following equation is balanced using the smallest possible whole numbers?

___ ${\text{C}}{{\text{a}}_{\text{3}}}{{\text{(P}}{{\text{O}}_{\text{4}}}{\text{)}}_{\text{2}}}{\text{(s)}} +$ ___ ${{\text{H}}_2}{\text{S}}{{\text{O}}_4}{\text{(aq)}} \to$ ___ ${\text{CaS}}{{\text{O}}_4}{\text{(s)}} +$ ___ ${{\text{H}}_3}{\text{P}}{{\text{O}}_4}{\text{(aq)}}$

D