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A nothced wooden stick from South Africa's Border Cave dating to 24,000 years ago contains the earliest evidence of humans using poison. Moreover, the poison applicator is just one of several artifacts, some dating to as early as 44,000 years ago, that resemble objects used by the San. Others include a digging stick, ostrich eggshell beads, carved pig tusks, bone arrowheads, and a lump of beeswax. Archaeologists have hypothesized that the finds indicate that San culture emerged about 44,000 years ago, making these the earliest link to a culture of modern humans.
Which of the following, if true, most strongly supports the archaeologists' hypothesis?
(A) Carbon-dating of human skeleton indicates that human were not able to make artifacts until 44,000 years ago.
(B) DNA"clock"by geneticists indicates that San and other cultures diverged 44,000 years ago.
(C) Successor cultures at given cave do not often adopt the style of agricultural implements used by earlier inhabitants of the same site.
(D) Poison is an important part of traditional San hunting methods because their bone-tipped arrows usually do not cause enough damage to kill large prey on their own.
(E) Except for notched wooden sticks, some of the artifacts dating to 44,000 year ago can also be used as prey tools.
OA: C
我觉得是这样
前提：在洞里找到了44000年以前的人造武器和毒药，而且看起来像是San 用过的 （果）
结论：San文化出现在44000年左右 （因）
想问一下这道题的A为什么不对，这不是排除了它因吗？如果44000以前人们就可以造这些东西了，那San肯定不会出现在44000左右啊。
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发表于 2016-10-2 09:59:53
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