Robert Gordon's Ethnography of the Bushmen Challenges Many Stereotyped Beliefs

Robert Gordon's ethnography of the Bushmen challenges many stereotyped beliefs about foraging societies and notes their ethnic diversity and linguistic diversity. What is one of the surprising elements that Gordon's work reveals?

A) their willingness to cede land to the colonial powers
B) their involvement with copper mining and trade
C) their ability to retain the lands they occupied prior to the colonial invasion
D) that their food sources also included agricultural methods