Final answer:
The sources of employees for international operations include third-country nationals, expatriates, and host-country nationals. Cross-country nationals are not a source of employees for international operations.
Step-by-step explanation:
The sources of employees to staff international operations include third-country nationals, expatriates, and host-country nationals. Third-country nationals are individuals who are citizens of a country other than the home country or the country where the international operations are located. Expatriates are employees from the home country who are sent to work in the international operations. Host-country nationals are employees who are citizens of the country where the international operations are located.
The correct answer is
d. cross-country nationals
, as this term is not commonly used or understood in the context of international operations.