What group made up the poor and working class citizens in the Roman Republic?

Plebeians made up the working class in the Roman Republic.

Explanation:

Most were farmers who worked land of the upper classes.

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so they can defeat there oppenent

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.