I read 1989 instead of 1889 when I answered this question I'm really sorry about that
The single main event that <span>caused the United states to become involved in world War 1 was the German sinking of the ship the "Lusitania," which contained many American citizens. </span>
Answer:
Is it a popular vote or ballot?
Explanation:
Social/Economic justice.
Environment
National Security (end war on terror)
Health care (universal)