Nigeria became a member of the Commonwealth of Nations on October 1, 1960, just before gaining independence. The Commonwealth promotes democracy and cooperation among former British colonies. Understanding this membership highlights Nigeria's post-colonial political evolution. ;
Nigeria became a member of the Commonwealth of Nations on October 1, 1960, coinciding with its independence from British rule. This membership is important for understanding Nigeria's political evolution and its ties with other former British colonies. Therefore, the correct answer is E. 1960.
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