Concept:Christianity became established in Sierra Leone through the freed Christian settlers who arrived in the late 18th century.Explanation:• The first Christian settlers reached Freetown in 1792.• In 1793, these settlers organised the first Christian congregations in Sierra Leone.• This marked the actual beginning of a continuous Christian presence in the colony.• Therefore, among the options given, Christianity started in Sierra Leone in 1793.Answer:B. 1793