The Bering Land Bridge was a landmass that connected Asia to North America during the last Ice Age. It was long believed that humans first crossed it and arrived in the Americas 13,000 years ago. However, the recent discovery of new archaeological sites ______ that humans may have crossed it between 15,500 and 20,000 years ago.
Which choice completes the text with the most logical and precise word or phrase?
7/13
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