22. Which of the following is the best reducing agent? \( Cl_2 + 2e^- \rightarrow 2Cl^- \) \( E^\circ = 1.36 \) V \( Mg^{2+} + 2e^- \rightarrow Mg \) \( E^\circ = -2.37 \) V \( 2H^+ + 2e^- \rightarrow H_2 \) \( E^\circ = 0.00 \) V (A) \( Cl_2 \) (B) \( H_2 \) (C) Mg (D) \( Mg^{2+} \) (E) \( Cl^- \)