Question ID:PT57 S2 Q22 Passage:Archaeologist:  After the last ice age, groups of paleohumans left Siberia and crossed the Bering land bridge, which no longer exists, into North America. Archaeologists have discovered in Siberia a cache of Clovis points‚ the distinctive stone spear points made by paleohumans. This shows that, contrary to previous belief, the Clovis point was not invented in North America. Stem:Which one of the following, if true, would most strengthen the archaeologist's argument? Correct Answer Choice:AChoice A:The Clovis points found in Siberia are older than any of those that have been found in North America. Choice B:The Bering land bridge disappeared before any of the Clovis points found to date were made. Choice C:Clovis points were more effective hunting weapons than earlier spear points had been. Choice D:Archaeologists have discovered in Siberia artifacts that date from after the time paleohumans left Siberia. Choice E:Some paleohuman groups that migrated from Siberia to North America via the Bering land bridge eventually returned to Siberia.