Final answer:
The correct answer is c) Third-country nationals are foreign citizens that work in U.S. companies' branch offices or manufacturing plants in their home countries.
Step-by-step explanation:
The correct answer is c) Third-country.
Third-country nationals are foreign citizens who work in U.S. companies' branch offices or manufacturing plants in their home countries. These individuals are neither local citizens nor expatriates from the U.S., but instead come from a third country.
An example to illustrate this would be a German citizen working for a U.S. company's branch office in Spain. In this case, the German citizen is a third-country national because they are not a local Spanish citizen and they are not an expatriate from the U.S.