Was Ubangi-Shari renamed

Yes, Ubangi-Shari was renamed the Central African Republic in 1958.

Was Central African Republic renamed

No, the Central African Republic has remained the same name since it was renamed from Ubangi-Shari in 1958.

Which colonizer gave independence to the Central African Republic and who was the Prime Minister/president of the colonizer at that time

The Central African Republic gained independence from France on August 13, 1960. The President of France at that time was Charles de Gaulle. The first President of the Central African Republic after independence was Barthélemy Boganda.

Who was the Nationalist leader(s) and what was the political party(ies) called?

Barthélemy Boganda was a prominent nationalist leader in the Central African Republic before and after independence. He founded the Movement for the Social Evolution of Black Africa (Mouvement pour l'Évolution Sociale de l'Afrique Noire, or MESAN) political party, which played a significant role in the anti-colonial movement and the struggle for independence.

What method was used to gain independence

The Central African Republic gained independence through a combination of peaceful negotiations with the colonial power France and growing nationalist movements led by figures like Barthélemy Boganda. The country's political leaders advocated for self-rule and autonomy, and ultimately, after various political and diplomatic efforts, the Central African Republic became an independent nation on August 13, 1960.