Which of the following chemical reactions is a single displacement reaction?
A. 2Na + O2
Na o
B. Pb(NO3)2 + 2KBr → PbBr2 + 2KNO3
C. 2Fe(OH)3 Fe2O3 + 3H20
D. 2A1 + 3Zn(NO3)2 2AI(NO3)3 + 3Zn​