Concept:In course-of-action questions, choose the action that addresses the threat effectively without being extreme or harmful.
Explanation:The outbreak in country
Y is serious, and WHO has asked countries to take preventive measures.
Course I suggests completely closing all borders to travelers from
Y.
This is an extreme step that can harm economy, trade, and international relations.
Also, a complete ban may not always be necessary or practical.
Course II suggests improving surveillance, monitoring entry points, and doing mandatory health screenings for travelers from
Y.
This is a balanced and practical response.
It helps detect and stop the spread of the disease while allowing necessary travel and trade.
Thus, only course of action II is appropriate.
Answer:B. if only course of action II follows