Columbus claimed to have found a route to the West Indies (what he was looking for). He belived his claim until his death. However, it was later discovered that he had in fact found the Americas.
        
                    
             
        
        
        
Answer=B
Fur was considered the black gold of the far north.
        
             
        
        
        
Innovations in farming techniques that led to great productivity.
1.- <em>Three Point Linkage</em>. Developed by Harry Ferguson, this invention raised or lowered the plough, depending on the depth farmers wanted to dig.
2.-  <em>Genetical Modified Corps</em>. Scientist isolate genes with some desirable traits to improve the quality of the plant.
3.- <em>Fertiliser Deep Placement.</em> A new form of fertiliser that increased the Yields. 
4.- <em>New Feeding Methods</em>. Blending different components of food to improve the quality of nutrition. 
 
        
                    
             
        
        
        
Answer:D
Explanation:
because The United States and Russia were at Cold war and having Cuba close to The US was dangerous since Russia could plant missiles aimed at the US