The most relevant response to evaluate why African independence movements failed to bring long-term success is:
Africans had difficulty with democracy after the legacy of colonialism.
This response highlights a significant challenge faced by many newly independent African nations. The colonial legacy often included a lack of experience with self-governance and deep-rooted issues such as ethnic divisions, economic dependency, and the imposition of arbitrary borders. These factors contributed to political instability and difficulties in establishing effective democratic institutions, which hindered long-term success and development in many African countries after independence.