Answer:
A
Explanation:
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The main point of the excerpt is that readers should be aware of the damage that the war has done to a generation of men who were impacted by it, and read the book with this idea in mind. 
The epigraph wants to make sure that readers who approach this book do it with the same purpose as the one with which the author wrote it. He does not want the readers to think of this book as an accusation, a confession or an adventure. 
 
        
             
        
        
        
Explanation:
Drugs like cannabis, cocaine, opium and ecstasy have catastrophic environmental impacts that range from deforestation to land sinking. Whether they smoked a joint on the couch or snorted a line in a club, some 269 million people around the world took drugs in 2018, according to the United Nations
Substance abuse affects and costs the individual, the family, and the community in significant, measurable ways including loss of productivity and unemployability; impairment in physical and mental health; reduced quality of life; increased crime; increased violence; abuse and neglect of children; dependence 
 
        
             
        
        
        
They wanted to prevent imperialism so the first goal was to establish a new balance of power in Europe.