Concept:The 1979 elections in Nigeria were won regionally by different parties, and the South West was controlled by the party that won its states.
Explanation:The Unity Party of Nigeria (UPN) was led by Chief Obafemi Awolowo.
In the 1979 governorship elections, the UPN won in five states of the South West.
These states were Lagos, Ondo, Oyo, Ogun, and Bendel.
By winning these states, the UPN controlled the government of the South West region.
Answer:D. UPN