West Africans discovered how to make iron in
A. 200 BC
B.300 BC
C. 400 BC
D. 500 BC

I'm pretty sure the answer is 500 bc

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