Galvanizing a Metal (Coating Its Surface with Zinc) to Prevent

Multiple Choice

Galvanizing a metal (coating its surface with zinc) to prevent corrosion works because

A) the coating limits access of oxygen to the metal surface
B) the coating reacts to give an impermeable layer of zinc hydroxide
C) the zinc coating provides cathodic protection
D) of reasons a and b.
E) of reasons a, b, and c.