<h2>Open Door Policy of 1899
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Congo Conference, 1885</h2><h2></h2><h3>Explanation:</h3><h3></h3>
Open Door policy, declaration of principles inducted by the United States in 1899 and 1900 for the assurance of equal opportunities among countries trading with China and in comfort of Chinese territorial and legislative honesty. The Berlin Conference of 1884–85, also identified as the Congo Conference or West Africa Conference, organized European colonization and trade in Africa during the New Imperialism period and agreed with Germany's sudden appearance as an imperial power.
Open Door Policy of 1899 and Congo Conference (Berlin Conference) in<span> 1885 are two events that show the United States acting as a mediator in </span>international<span> disputes. The US initiated the Open </span>door<span> Policy for the protection of equal privileges among countries doing business transactions with China. Whereas for the Congo </span><span>Conference </span>,<span> the US joined in to work out the joint policy on the African continent.</span> <span> </span>
Marbury v. Madison, legal case in which, on February 24, 1803, the U.S. Supreme Court first declared an act of Congress unconstitutional, thus establishing the doctrine of judicial review. The court’s opinion, written by Chief Justice John Marshall, is considered one of the foundations of U.S. constitutional law.
I believe it is B:Helps pump water out of flodded boats and if thats not right then it should be D sorry if im wrong i just woke up and if i right then please grant me brainliest-Lucina