Concept:Identify the Nigerian leader who mediated peace talks during Liberia's civil war.Explanation:Liberia's civil war ended in 2003 after years of conflict.Olusegun Obasanjo, as Nigeria's president, played a key role in those peace negotiations.His efforts helped establish a transitional government in Liberia.This made Nigeria central to the West African peace process.Answer:A. Olusegun Obasanjo