Concept:The summit that provided the implementation plan for forming the African Union is the Lusaka Summit.
Explanation:The African Union was set up to replace the Organisation of African Unity.
The roadmap for this change was adopted at the Lusaka Summit.
This summit was held in Lusaka, Zambia, in July 2001.
It clearly outlined the steps for establishing the African Union.
The African Union was later officially launched in Durban, South Africa, in 2002.
Therefore, the correct summit is the Lusaka Summit.
Answer:B. Lusaka Summit