Another characteristic that all three empires shared was their impact on

answer:    

a.

explanation:

- a.) african slaves and indentured servant’s

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not sure but thinking i'ts cause the government was broke. not sure

they chose sides following the death of the islamic prophet muhammad in ad 632. a dispute over succession to islamic prophet muhammad as a caliph of the islamic community spread across various parts of the world, which led to the battle of jamal and battle of siffin.

hope it