Iron(III) ions, ${\text{F}}{{\text{e}}^{3 + }}$, react with thiocyanate ions, ${\text{SC}}{{\text{N}}^ - }$, in a reversible reaction to form a red solution. Which changes to the equilibrium will make the solution go red?

    ${\text{F}}{{\text{e}}^{3 + }}{\text{(aq)}} + {\text{SC}}{{\text{N}}^ - }{\text{(aq)}} \rightleftharpoons {{\text{[FeSCN]}}^{2 + }}{\text{(aq)}}$     $\Delta {H^\Theta } =  + {\rm{ve}}$

     Yellow$\quad \quad \quad \quad \quad \quad \quad \quad \;$Red

I.     Increasing the temperature

II.     Adding ${\rm{FeC}}{{\rm{l}}_3}$

III.     Adding a catalyst

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

A