Concept:A severe internal leadership crisis split the Action Group and led to the birth of a new political party.
Explanation:In 1963, the Action Group encountered a major internal crisis.
The party was divided between supporters of Chief Obafemi Awolowo and those of Chief S.L. Akintola, the Premier of the Western Region.
The disagreement centred on how the Western Region was being governed.
As the conflict grew worse, Chief S.L. Akintola was dismissed from the Action Group.
After the dismissal, Akintola and his loyal supporters broke away from the party.
They then formed a new political party called the United Peoples Party (UPP).
This new party was established in the Western Region and served as the political platform of Akintola's faction.
Hence, the Action Group crisis of 1963 directly brought about the formation of the UPP.
Answer:A. UPP (United Peoples Party).