Answer :
Final answer:
The USS Maine sinking in Havana Harbor triggered U.S. involvement in the Spanish-American War.
Explanation:
The best answer is option D: after the U.S. battleship Maine exploded and sank in Havana Harbor. The sinking of the USS Maine was a crucial event that propelled the United States into the Spanish-American War. The explosion of the ship resulted in the loss of many American lives and intensified the calls for intervention in Cuba's fight for independence.
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