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 (1898) resulted in the United States gaining territories such as Puerto Rico, Guam, and the Philippines. This led to a decline in Spanish influence in the Western Hemisphere and marked the beginning of the United States as an imperial power with increased influence in both the Western and Eastern Hemispheres.