During the electrolysis of sodium Chloride solution, hydrogen is discharged at the carbon cathode because ____________

A. hydrogen ions are in greater concentration than sodium ions.
B. hydrogen is higher than sodium in the electrochemical series.
C. hydrogen is lower than sodium in the electrochemical series.  
D. of the nature of the electrodes.
E. the concentration of sodium ions is greater than that of the hydrogen ion in the electrolyte.

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Correct Answer: C