The most effective instrument adopted by Nigeria against the East-West Cold War in the 1960s was
The correct answer is: D
Explanation
During the 1960s, Nigeria adopted the non-alignment policy as an effective instrument to navigate the East-West Cold War. This policy meant that Nigeria chose not to align with either the capitalist bloc (led by the United States) or the communist bloc (led by the Soviet Union). Instead, it focused on maintaining independence in foreign relations and avoiding entanglement in ideological conflicts between the two superpowers.