8.5 g of ${\text{N}}{{\text{H}}_{\text{3}}}$ are dissolved in ${{\text{H}}_{\text{2}}}{\text{O}}$ to prepare a ${\text{500 c}}{{\text{m}}^{\text{3}}}$ solution. Which statements are correct?

I.     ${\text{N}}{{\text{H}}_{\text{3}}}$ is the solute and ${{\text{H}}_{\text{2}}}{\text{O}}$ is the solution

II.     The concentration of the solution is ${\text{17 g}}\,{\text{d}}{{\text{m}}^{ - 3}}$

III.     ${\text{[N}}{{\text{H}}_3}{\text{]}} = 1.0{\text{ mol}}\,{\text{d}}{{\text{m}}^{ - 3}}$

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

C