What were the conditions like for slaves once they were emancipated?

Some emancipated slaves quickly fled from the neighborhood of their owners, while others became wage laborers for former owners. Most importantly, African Americans could make choices for themselves about where they labored and the type of work they performed.

2: albert einstein was one of several german scientists who the allies defeat the nazis

explanation:

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according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

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