You have described the Berlin Conference which occurred in 1884-85 to create a peaceful means of carving the continent of Africa. Of course, the Africans were not represented and viewed this as conquest instead of a peaceful negotiation. This would settle European fighting over land and begin a 80-90 year period of European colonization throughout Africa and the world.
The correct answer here would be C. The focus on steel was such that it took people away from their fields and they have missed an excellent season for food production in 1958. The weather in 1959 was disastrous and the yearly harvest was not nearly enough to sustain the Chinese population which led to widespread famine.
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I’m pretty sure the new ideas affect the old ones. As time goes on things change which can impact things that happened before then
After Gavrilo Princip assassinated Archduke Franz Ferdinand of Austria in Sarajevo, Bosnia, the Austrian government invaded the Kingdom of Serbia. Famously named as the Serbian Campaign of World War I, the Austrian government marched up with hundred of thousands of soldiers and invaded the Kingdom of Serbia thus, started the World War I.