Why Did European Governments Grant Independence to African Colonies Later

Why did European governments grant independence to African colonies later than Asian colonies?

A) Colonialism was more entrenched in Africa-the West had taken possession of that continent long before it had established itself in Asia.
B) In Africa, colonial policies had created fewer obvious candidates for successor states and governments-European colonial rulers thought this meant independence was much further away.
C) Western military power was greater in Africa since it was closer to Europe than was Asia and relied more heavily on African bases-European governments were more unwilling to give these up.