Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode?

Occurs higher in the electro-chemical series of metals

Is exemplified by magnesium plate

Is much cheaper than the cathodic base material to be guarded against corrosion

Sacrificial anode method is used in the protection of pipelines which

1.	Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode?
A.	Occurs higher in the electro-chemical series of metals
B.	Is exemplified by magnesium plate
C.	Is much cheaper than the cathodic base material to be guarded against corrosion
D.	All of the above
Answer» E.