b, a wouldn't make sense because in history in general people have tended to like meritocracy over aristocracy. C and D don't make sense because aristocracy doesn't include how hard a person works for a job
<span>B. They created strong central governments in the lands they conquered.
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Archimedies discovered water displacement when he took a bath to help the king of egypt to see if his crown has real gold when he took a dip the water flowed over the top and he discovered water displacement
Gathered together (a large amount of people)