Concept:The Economic Community of West African States was formed through the joint effort of two West African leaders.
Explanation:ECOWAS was founded on May 28, 1975, in Lagos, Nigeria.
The founding treaty was spearheaded by President Eyadéma of Togo and General Yakubu Gowon of Nigeria.
At that time, Yakubu Gowon was Nigeria's Head of State.
He therefore played a key role in championing the creation of ECOWAS.
Among the listed Nigerian leaders, Yakubu Gowon was the one involved.
Answer:B. Yakubu Gowon