Which of the following reactions is a metal displacement reaction? Choose the right option.
- A$2 KClO_{3} \stackrel{\Delta}{\longrightarrow} 2 KCl + 3 O_{2}$
- B$Cr_{2}O_{3} + 2 Al \stackrel{\Delta}{\longrightarrow} Al_{2}O_{3} + 2 Cr$
- C$Fe + 2 HCl \rightarrow FeCl_{2} + H_{2} \uparrow$
- D$2 Pb(NO_{3})_{2} \rightarrow 2 PbO + 4 NO_{2} + O_{2} \uparrow$
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