Most likely for medical purposes or food
The correct answer is - trade.
The Sumerians engaged in trade with their move of exchanging their surplus food for materials like the copper that they needed to develop their weapons and thus their army forces. This was a very smart move from their side because they managed to use the resource they had in abundance but was scarce in the other surrounding areas so that they take what they need to become stronger and pretty much defend more efficiently from the same people they were engaging in trade with.
I believe that the best answer among the choices provided by the question is <span>The passage of the Nineteenth Amendment showed women that they could collectively bargain at work for the rights they wanted.</span>
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