1 Which of these is closest in length to the Great Wall of
China?
А
The coastline of the state of California
B
The street your school is on
С
The border between the U. S. and Canada
D
The border between Massachusetts and Rhode Island

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict