题目内容
One of the motivations to move westward was to find. great wealth quickly through developing and trading the colonies' resources.
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It took Americans a century and a half to expand as far west as the Appalachian Mountains.
Among the common motivations of moving westward are finding great wealth and practicing religion without government intervention.
James W. Marshall was the first person to discover a gold mine in California.
The vast majority of those who arrived in California were Americans.
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