Concept:Mary Slessor was a Scottish Presbyterian missionary known for her work against harmful local practices in Calabar.
Explanation:In parts of southeastern Nigeria, the birth of twins was seen as a curse.
The traditional belief led to the killing of twin babies and the banishment of their mothers.
Mary Slessor strongly opposed this superstitious practice.
She protected twins, rescued abandoned babies, and persuaded the people to abandon the custom.
Her primary mission was therefore to stop this killing of twin babies, not to spread colonialism or simply introduce European culture.
Answer:D. eliminating the tribal superstitious practice of killing of twin babies