What events led up the United States entering World War I?

The causes of the US entry into WW1 included the Sinking of the passenger ship the Lusitania which was sunk by a German U-Boat. ... Wilson asked Congress to declare war against Germany, and the US entry into WW1 began on April 6, 1917

Explanation:

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.