17. Identify the oxidation-reduction reactions among the following: (4 points)
1. $Zn(s) + Cu^{2+}(aq) \to Zn^{2+}(aq) + Cu(s)$
2. $2 Na(s) + Cl_2(aq) \to 2NaCl(s)$
3. $2 Mg(s) + O_2(g) \to 2 MgO$
A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) All of 1, 2, and 3