(A) ** The US gained territories and became a world power.
(B) The U.S. lost the war and was in a lot of debt.
(C) The population of the US doubled in size.
(D) The U.S. reduced the size of its military after all of the casualties.
EXPLANATIONS BELOW
Concept note-1: -U.S. victory in the war produced a peace treaty that compelled the Spanish to relinquish claims on Cuba, and to cede sovereignty over Guam, Puerto Rico, and the Philippines to the United States. The United States also annexed the independent state of Hawaii during the conflict.
Concept note-2: -Representatives of Spain and the United States signed a peace treaty in Paris on December 10, 1898, which established the independence of Cuba, ceded Puerto Rico and Guam to the United States, and allowed the victorious power to purchase the Philippines Islands from Spain for $20 million.
Concept note-3: -How did the Spanish American War make the United States a world power? The US victory in the Spanish American War resulted in the Us gaining possession and/or control of many new territories. These and other territorial gains resulted in the creation of a new far flung empire.