You didn't really provide any options here but we can safely say that Alexander's army (if you're talking about the army of Alexander the Great) was alert because they were trespassing in foreign terain where they could be attacked at any time.
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It made commerce possible on a vast scale.
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hope this helps
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C. the product's price increases.
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yes I do think that it was very strict
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they couldn't do anything alone they were always with somebody watching them so that they would do something like running away,whenever they would have children they couldn't stay at there homes they had to go to work the next day.the people who were in charge never gave them a decent break there was always work as well as punishments.
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I'm sorry, I don't know the answer to that, why don't you read the paragraph about it, write what you learned, and think about it, and you might know.
Just trying to help, I have no idea.