Answer:
The answer is B. He wanted to know more about what happens when a child is raised in isolation.
Step-by-step explanation:
Kingsley Davis was an american sociologist and demographer, although his main studies centered around the study of population and society seen from a macro perspective, focusing on social structure, he was also interested in family conflict, adolescence and marriage, among other subjects.
He became interested in the case of a child known as Anna, who was kept in isolation during the first six years of her life; Kingsley Davis saw her case as an opportunity to know about the consequences of isolation in human development. He studied her social abilities, cognitive capacity and speech development and wrote two articles regarding this case.