Which statements are correct for a voltaic cell?

$\begin{gathered} \begin{array}{*{20}{l}} {{\text{I.}}}&{{\text{A spontaneous redox chemical reaction produces electrical energy.}}} \\ {{\text{II.}}}&{{\text{Oxidation occurs at the cathode (negative electrode).}}} \\ {{\text{III.}}}&{{\text{Electrons flow from anode (negative electrode) to cathode (positive electrode).}}} \end{array} \hfill \\ \hfill \\ \end{gathered}$

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

B