Of the following statements concerning electrochemical cells, the correct ones are: 

(a) The cathode is the negative electrode in both voltaic and electrolytic cells. 

(b) The function of a salt bridge is to permit the migration of electrons between the half-cell compartments of an electrochemical cell. 

(c) The anode is the negative electrode in a voltaic cell. 

(d) Electrons leave the cell from either the cathode or the anode, depending on what electrodes are used.

(e) Reduction occurs at the cathode in both voltaic and electrolytic cells. 

(f) If electric current is drawn from a voltaic cell long enough, the cell becomes an electrolytic cell. 

(g) The cell reaction is an oxidation–reduction reaction.