One of these reactions represents the laboratory preparation of hydrogen.

• A.C(s) + H₂O(t) ⟶ CO(g) + H₂(g)
• B.2Na(s) + 2H₂O(l) ⟶ 2NaOH(aq) + H₂(g)
• C.Cu(s) + H₂O(l) ⟶ CUO(s) + H₂(g)
• D.2Al(s) + 3H₂O(l) ⟶ Al₂O₃(s) + 3H₂(g)
• E.Zn(s) + 2HC1(aq.) ZnCl2(aq) + H2(g)