Passage Summary: Scientists think a massive drought, not just people fighting, destroyed ancient Egypt, because they found evidence of a big weather shift right when the kingdom fell.

Conclusion: Environmental disasters, specifically drought, were the primary cause of the Old Kingdom's downfall.

Reasoning: Scientific data from ocean floors indicates a period of global cooling and drought coincided with the collapse, suggesting social unrest was a symptom rather than the cause.

Analysis: To strengthen this, we need to bolster the link between the environmental data and the specific collapse of Egypt. The argument admits there were social problems, so we want evidence that these problems weren't enough to cause a collapse on their own, or that the drought was severe enough to be the 'smoking gun.' Look for an answer that shows other civilizations survived social unrest but failed under similar droughts, or one that confirms the drought's timing perfectly matches the collapse.