slaves are treated as the personal assets of their masters unlike servants
slaves are never remunerated for their services while servants are working in exchange for a previously agreed upon amenity, free accomodation or passage to another country.
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New inventions!
I'm not sure if I'm correct for this one, correct me if I'm wrong.
Answer:
They transported fresh, drinkable water throughout the Roman Empire. They were designed so well, most are still standing today.
Answer:
D. Evolution was scientific fact