Which of the following net cell reactions takes place in a galvanic cell containing a copper electrode and a standard hydrogen electrode $(SHE)$? Given: $E^{\circ}(Cu^{2+}_{(aq)} \mid Cu_{(s)}) = +0.34 \ V$.

• A
  $Cu_{(s)} + 2H^{+}_{(aq)} \longrightarrow Cu^{2+}_{(aq)} + H_{2(g)}$
• B
  $H_{2(g)} + Cu^{2+}_{(aq)} \longrightarrow 2H^{+}_{(aq)} + Cu_{(s)}$
• C
  $Cu_{(s)} + H_{2(g)} \longrightarrow Cu^{2+}_{(aq)} + 2H^{+}_{(aq)}$
• D
  $Cu^{2+}_{(aq)} + 2H^{+}_{(aq)} \longrightarrow Cu_{(s)} + H_{2(g)}$