Answer:
Equestrians
Explanation:
The plebians did more simple jobs like baking, and manufacturing of primary and secondary economic goods, gladiators were warriors and didn't really do tasks for the Roman Empire other than entertain and fight for the army. The aristocrats were mainly the senatorial class.
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Abolitionist John Brown leads a small group on a raid against a federal armory in Harpers Ferry, Virginia (now West Virginia), in an attempt to start an armed slave revolt and destroy the institution of slavery.
The correct answer is B. Antoine-Laurent de Lavoisier was a French chemist, biologist and economist who discovered <em>the law of conservation of matter</em> in 1785.
This law states that during a chemical reaction, <u>the total mass in the system remains constant</u>, that is, the mass consumed of the reactants is equal to the mass of the products obtained.