Cultural Distance Is a Measure of the Dissimilarity of Habits

Cultural distance is a measure of the dissimilarity of habits, customs, language and values between people of different cultures. During which of the following periods of Australian history has cultural distance between groups been greatest?

A) During the White Australian Policy after Federation
B) During large-scale refugee settlement from Southern Europe after World War II
C) In the late-nineteenth century when Chinese and Afghan workers were recruited by Australian settlers
D) Since the 1980s with greater Australian recognition of human rights initiatives by the United Nations