Which of the following is commonly used as a sacrificial metal?
(a) magnesium
(b) iron
(c) gold
(d) copper

A

Explanation:

Magnesium.

Magnesium, Zinc and Aluminium are called as Sacrificial Anodes.

They are relatively pure active metals.

the sacrificial anode works by introducing another metal surface with a more negative electronegative and much more anodic surface.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them