Nigeria's top contribution to Africa's agenda of decolonisation and anti-racism was mostly enhanced with the formation of the_________

Analyze the question: It asks which organisation's formation most enhanced Nigeria's contribution to Africa's decolonisation and anti-racism (anti-apartheid) agenda.

Concept: After independence in 1960, Nigeria adopted Africa as the "centrepiece" of its foreign policy. A major part of this was supporting the liberation of colonised territories and opposing racial discrimination, especially apartheid in South Africa. The best platform for this was a continental body whose core aims were to end colonialism and racism in Africa.

Evaluating the options:

• A. NEPAD (2001): Focuses on economic development and governance, not decolonisation. Decolonisation was largely complete by then.
• B. OAU (1963): Founded to promote African unity and to eradicate all forms of colonialism. It set up the Liberation Committee, and Nigeria was a key member and financial supporter. Nigeria used the OAU to push for the end of apartheid and white-minority rule in Southern Africa. This fits the question directly.
• C. ECOWAS (1975): A regional economic body for West Africa, focused on economic integration, not decolonisation.
• D. OPEC (1960): An oil-producing countries' body, concerned with petroleum policy and prices.

Exam tip: Link keywords to organisations: "decolonisation / anti-apartheid / African unity" means OAU (now the African Union). "Economic integration in West Africa" means ECOWAS. "Oil" means OPEC. "Development programme" means NEPAD.