Answer:
Thomas Malthus.
Explanation:
Thomas Malthus was the person that affected and influenced Sir Charles Trevelyan's ideas about government intervention.
This is because, Sir Charles was a British official who was faced with the problem of scarcity of potato and Great famine in 1840 and his decision not to help the Irish was probably because of what was taught to him by his professor Thomas Malthus. 
Thomas Malthus taught in his theory of population that population would increase while available food would not increase in the same manner and would cause large scale shortage.
 
        
             
        
        
        
<span>a variety of literary works</span>
        
             
        
        
        
Answer:
D. A strong foreign relations policy was established
Explanation:
The Articles of Confederation is generally believed to be weak and a failure. This is why a new constitution was made later.
 However, the articles of Confederation were successful in some areas, particularly when it comes to " strong foreign relations." 
This is evident in the fact that the Articles of Confederation was crucial in the negotiation of a coalition with the French and at the same time the ratification of the Treaty of Paris in 1783 which helped in stopping the American Revolutionary War
 
        
             
        
        
        
Third Option: Cheaper, Higher Quality Metals Became Available.
Gradpoint :P