The response that best assesses the impact of colonization on religion in Africa is:
"Colonial powers used Christianity to control Africans, and they tightly controlled Christian churches."
This statement reflects the complex relationship between colonization and religion, acknowledging that while missionaries worked to convert Africans, colonial authorities often utilized religion as a means of exerting control over local populations and managing social structures. It captures the dual role of Christianity as both a tool of conversion and a mechanism of colonial power.