The two correct answers regarding the change in the balance of power between Spain and the United States as a result of the Spanish-American War are:
- Spanish influence in the Western Hemisphere declined.
- U.S. influence in the Eastern Hemisphere increased.
The Spanish-American War resulted in the United States emerging as a significant power in the Western Hemisphere, while Spain's colonial influence notably diminished. Additionally, the war and its outcomes allowed the U.S. to extend its reach into the Eastern Hemisphere, particularly with territories like the Philippines.