The formula of gallium phosphate is ${\text{GaP}}{{\text{O}}_{\text{4}}}$. What is the correct formula of gallium sulfate?

A.     ${\text{GaS}}{{\text{O}}_{\text{4}}}$

B.     GaS

C.     ${\text{G}}{{\text{a}}_{\text{2}}}{{\text{(S}}{{\text{O}}_{\text{4}}}{\text{)}}_{\text{3}}}$

D.     ${\text{G}}{{\text{a}}_{\text{2}}}{{\text{S}}_{\text{3}}}$

C