The two reasons:  
- Britain intercepted the Zimmerman Telegram
- Germany resumed unrestricted submarine warfare
Context/detail:
Public outrage in the US against the Germans swept the nation following the sinking of the British ocean liner, <em>Lusitania</em> -- but that happened before 1917.  When a German U-boat (submarine) sank the Lusitania in May, 1915, over 1,000 persons were killed, including more than 100 Americans. The passenger liner was targeted by the Germans because they suspected weapons were being shipped to Britain in the cargo hold of the ship.
Germany managed to stave off American entry into the war at the time by pledging to stop submarine attacks.  But a couple years later they resumed such attacks, and there was also an intercepted telegram (the "Zimmerman Telegram") that showed Germany was trying to secure Mexico as an ally against the United States.  
In 1917, the US declared war on Germany in response.
 
        
             
        
        
        
That's because they were preparing for the biggest war in human history. This was the policy of militarism where building up a military was necessary to ensure that the people could fight against others. The number of soldiers in European armies increased twice in size in only 20 years between the 1890s and 1910s.
        
             
        
        
        
Answer:
Lewis and Clark's team mapped uncharted land, rivers, and mountains. They brought back journals filled with information about the Native American tribes. They also brought back scientific notes about plants and animals they'd never seen before.
 
        
             
        
        
        
The answer is most likely c.
        
             
        
        
        
Answer:
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Explanation:
The First Charter of Virginia, also known as the Charter of 1606, is a document from King James I of England to the Virginia Company assigning land rights to colonists for the stated purpose of propagating the Christian religion.