Concept:Cathodic protection prevents corrosion by forcing the metal to act as a cathode, so it does not undergo oxidation.
Explanation:Corrosion occurs when a metal loses electrons and gets oxidized.
The ease with which a metal loses electrons is shown by its position in the electrochemical series.
In cathodic protection, a more reactive metal is used as a sacrificial anode.
This sacrificial anode gets oxidized instead, while the protected metal remains the cathode.
Therefore, the process depends on the relative tendencies of oxidation of the metals involved.
Answer:D. relative tendencies of oxidation