It was controlled by the Roman Empire, and only Roman citizens were allowed to fish or swim in it. Hope that helps!
Answer: Colleges changed because slavery ended.
Explanation: Slavery ended on September 22, 1862. Because of this, African-Americans were allowed to start attending colleges.
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Looking back at history let's you see what didn't work and what will come in the future. Let's say I am looking for a way to stop viruses on computers, I would look back and see where viruses attacked, what their intent was and fixed vulnerabilities that have not been fixed.