Answer:
Infant industry.
Step-by-step explanation:
In this scenario, Company Z is a U.S. company that is the first in this country to produce a good that is already produced in many foreign countries and sold in the United States. Most likely, the argument it will voice in its attempt to be protected from foreign competition is the infant industry argument.
An infant industry can be defined as an industry that is still in its early stages of development and as such are not capable of competing with foreign companies.
Hence, according to the infant industry theory the argument would be that infant industries should be offered some kind of protection from competitors in other industries either foreign or local until they mature and develop a good and reputable economies of scale.