What event could not have been a cause for the extinction of large animals in north America?

The rise of humans in North America could not have been a cause for the extinction of large animals if it occurred after the species had already disappeared. While human activities, such as hunting and habitat alteration, likely contributed to the decline of large mammals like the woolly mammoth and saber-toothed cat, their extinction generally happened before widespread human presence in the region. Additionally, factors like climate change and habitat loss are often cited as primary causes for these extinctions, rather than human influence alone.