Concept:A frontline state was an African country actively committed to ending apartheid and white minority rule in Southern Africa.
Explanation:Nigeria strongly supported liberation movements in Southern Africa, including those in South Africa, Zimbabwe, and Namibia.
She provided financial, diplomatic, and material assistance to freedom fighters in the region.
This strong opposition to apartheid and support for majority rule earned Nigeria recognition as a frontline state, even though she is geographically distant from Southern Africa.
Answer:D. Assisted the liberation struggle in Southern Africa.