Recent Research on Hunters-Gatherers Indicates All of the Following Except

Recent research on hunters-gatherers indicates all of the following except:

A) some hunter-gatherers have never had direct contact with technologically-advanced populations.
B) some hunter-gatherers are chronically undernourished.
C) there are occasional seasonal fluctuations in the hunter-gatherer diet.
D) many hunter-gatherers spend significantly less amounts of time in subsistence than we originally thought.
E) some hunter-gatherers have been involved in raiding and fighting with other groups.