Which statement correctly describes an electrode in a voltaic cell of copper and hydrogen?

a. copper atoms become copper ions at the anode because the srp is more positive.

b. hydrogen ions become diatomic hydrogen at the cathode because hydrogen is always reduced in a voltaic cell.

c. copper ions become copper atoms at the cathode because copper is always reduced in a voltaic cell.

d. diatomic hydrogen becomes hydrogen ions at the anode because the srp is more negative.