Question

what battleship exploded in the harbor in havana, cuba - setting the stage for the united states and spain going to war shortly afterwards?○ uss enterprise○ uss maine○ uss arizona○ uss valencia

Explanation:

The explosion of the USS Maine in Havana Harbor in 1898 was a key event that led to the Spanish-American War, matching the description in the question. The other ships were involved in different historical events: the USS Arizona was sunk at Pearl Harbor, the USS Enterprise was a WWII aircraft carrier, and the USS Valencia was a passenger ship wrecked in 1906.

Answer:

O USS Maine