In the electrochemical cell $H_{2(g)}, 1 \ atm \ | \ H^+_{(aq)}, 1 \ M \ || \ Cu^{2+}_{(aq)}, 1 \ M \ | \ Cu_{(s)}$,which of the following statements is true?

• A
  $H_2$ is cathode,$Cu$ is anode
• B
  Oxidation occurs at $Cu$ electrode
• C
  Reduction occurs at $H_2$ electrode
• D
  $H_2$ is anode,$Cu$ is cathode