What are developmental milestones and how are they measured?

what precedent do you see the ordinance of 1787 setting for the 1st amendment of the us constitution : )

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president thomas jefferson hoped that the embargo act of 1807 would the united states by demonstrating to britain and france their dependence on american goods, convincing them to respect american neutrality and stop impressing american seamen. instead, the act had a devastating effect on american trade.