Both General Ibrahim Babangida and General Sani Abacha Prolonged Their

Both General Ibrahim Babangida and General Sani Abacha prolonged their rule by

A) promising to return the country to civilian rule and then regularly delaying it.
B) instituting themselves as "presidents-for-life."
C) setting up "transitional governments" that were meant to fail.
D) manipulating ethnic groups.
E) changing the country's constitution.