Which Statement Concerning Overvoltage Is False

Multiple Choice

Which statement concerning overvoltage is false?

A) Overvoltage is the additional voltage above the calculated voltage required to bring about electrolysis.
B) Overvoltage is often due to a high activation energy for the reaction at one electrode.
C) Overvoltage is small for half-reactions involving the formation of O₂(g) or H₂(g) .
D) Overvoltage must be experimentally determined.