Correct Answer:
C. 12 months
According to the United Nations, a person is considered an international migrant if they change their country of usual residence for at least 12 months. This definition helps distinguish between short-term visitors, such as tourists or business travelers, and individuals who are establishing a new residence in a foreign country for a more substantial period.
- Durations like 3 months or 6 months are typically considered short-term visits and do not meet the UN's threshold for an international migrant.
- While 24 months would certainly qualify, the specific minimum threshold set by the UN for statistical and policy purposes is 12 months.