(A) WWI
(B) Mexican American War
(C) Civil War
(D) ** Spanish American War
EXPLANATIONS BELOW
Concept note-1: -The war was fought on two fronts-in the Caribbean and in the Philippines.
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: -The Spanish–American War (April 21 – August 13, 1898) was a period of armed conflict between Spain and the United States.
Concept note-4: -The reasons for war were many, but there were two immediate ones: America’s support the ongoing struggle by Cubans and Filipinos against Spanish rule, and the mysterious explosion of the battleship U.S.S. Maine in Havana Harbor.