How did the northwest ordinance of 1787 affect slavery?

the court ruled that a state law that banned abortions (except to save the life of the mother) was unconstitutional

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no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.