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 U.S. emerging as a dominant power in the Western Hemisphere and acquiring territories such as Puerto Rico, Guam, and the Philippines, thus increasing its influence in the Eastern Hemisphere as well.