What was the purpose of the open door policy? to encourage free trade between european nations and the united states to collaborate with other nations to maintain a common price level for free trade in china to allow any country to trade with the united states with prices determined by market forces to encourage other nations to engage in free trade with china, thereby improving its economy

I'm pretty sure it's D) to encourage other nations to engage in free trade with China, thereby improving its economy

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.

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.