Countries should put aside selfish feelings and work together with other countries.

• A. Unilateralism
• B. Internationalism
• C. Multilateralism
• D. Humanitarianism

Answer: (B)

Working with other countries and setting aside selfish interests signals a belief in international cooperation. This idea is described by internationalism, which promotes nations engaging with one another to address global issues and share common goals.

Acting unilaterally means doing things alone, which is the opposite of working with others. Multilateralism focuses on cooperation among many states through formal institutions, which is close but more specific about organized, institutional action. Humanitarianism centers on aiding people in need and moral responsibility rather than the broader pattern of international cooperation between governments.

So the statement best fits internationalism because it captures the general idea of countries collaborating across borders rather than acting alone or solely through formal institutions.