How Did Early Twentieth-Century Anthropology Differ from the Anthropology Practiced

How did early twentieth-century anthropology differ from the anthropology practiced in nineteenth-century Europe?

A) Twentieth-century anthropologists' research focused on kinship and religion, whereas nineteenth-century anthropologists were more interested in economics and politics.
B) Whereas twentieth-century anthropologists took a four-field approach to understanding culture, nineteenth-century anthropologists were mostly interested in material culture.
C) Nineteenth-century anthropologists were mostly interested in present-day cultures as they existed, but twentieth-century anthropologists were interested in the processes by which cultures changed.
D) Nineteenth-century anthropologists conducted long-term fieldwork, but twentieth-century anthropologists tended to rely on explorers' accounts.