请教OG12--CR45

45、Some anthropologists study modern-day societies of foragers in an effort to learn about our ancient ancestors who were also foragers. A flaw in this strategy is that forager societies are extremely varied. Indeed, any forager society with which anthropologists are familiar has had considerable contact with modern, non-forager societies.
Which of the following, if true, would most weaken the criticism made above of the anthropologists' strategy?
(A)All forager societies throughout history have had
a number of important features in common that
are absent from other types of societies.

(B)Most ancient forager societies either dissolved
or made a transition to another way of life.

(0All anthropologists study one kind or another of
modern-day society.

(D)Many anthropologists who study modern-day
forager societies do not draw inferences about
ancient societies on the basis of their studies.

(E)Even those modern-day forager societies that
have not had significant contact with modern
societies are importantly different from ancient
forager societies.
这道题我不理解Indeed, any forager society with which anthropologists are familiar has had considerable contact with modern, non-forager societies.这句话的含义，OG解释上说这句话意思为：the contemporary foragers have had so much contact with modern societies.请大家帮我分析分析这句话~