23. what does the graph suggest about the effectiveness of the naval blockade that great britain set up to keep essential goods from reaching germany during world war 1

Base from the graph of US exports to great Britain, france and germany. the naval blockade that great britain set up to keep essential goods from reaching germany during world war 1is very effective, because the from 1914 - 1918 the goods reaching the Germany is very minimal and even reach zero from 1916 to 1918.