Final answer:
Colonization in Central Africa promoted ethnic division through strict cultural assimilation policies, favoritism towards certain ethnic groups, and the imposition of artificial borders.
Step-by-step explanation:
Colonization in Central Africa promoted ethnic division through various means. First, colonizers enforced strict cultural assimilation policies (option a), disregarding ethnic boundaries and imposing their own culture on the local populations. Additionally, colonial powers favored certain ethnic groups over others (option b) to maintain control, creating divisions and conflicts between different groups. Finally, the imposition of artificial borders (option c) separated ethnic communities, often placing warring groups together in the same colony and exacerbating existing tensions.