which major change took place in nigeria in 1999? a. ethnic tensions came to an end. b. a peace treaty concluded the civil war. c.military leaders led a government coup. d.a civilian president was elected.

The major change that took place in Nigeria in 1999 was D.) A CIVILIAN PRESIDENT WAS ELECTED.

Olusegun Obasanjo was the President of Nigeria who took office on 29th May 1999. He was under the Political Party of People's Democratic Party. He served from 29th May 1999 to 29th May 2007, exactly 8 years. 

Ummm they were radical