If the steel industry argues for tariff protection by saying that steel is necessary to build military vehicles, it is using the:

The correct answer to this is the:

"National Defense Argument"

Tariff is the tax imposed on imports. This is used to specifically limit or restrict trade since they increase the price of the imported goods and services. Since steel is primarily used in the manufacture of military weapon and vehicles, restricting the trade might be detrimental to the nation especially if there is a trade disruption due to war.