The Answer is.......  D.) 100%.
        
                    
             
        
        
        
Answer:
The War I think
Explanation:
What led to the European disease was the cause of the war that made many Americans come and then it called the disease
 
        
             
        
        
        
I don’t think it’s insane, it’s just how is humans are. I don’t think it’s nice. I was very aware about the situation as a whole, bit it’s what people have been doing for years, like years and years. It’s kinda human nature