og 的一道逻辑，帮忙

angelazhao1010

13.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 strat-egy is that forager societies are extremely varied. Indeed， any forager society with which anthropologists are familiar has had considerable contact with mo-dern nonforager 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.
（C） All 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.
我想问一下讲的什么意思啊 可以帮我解释一下吗，选A

angelazhao1010

自己顶一下啊~