(A) America annexing Hawaii
(B) Spain annexing Puerto Rico
(C) ** Spain was threatening US economic interests in Cuba
(D) unrestricted submarine warfare
EXPLANATIONS BELOW
Concept note-1: -36. On April 25, 1898 the United States declared war on Spain following the sinking of the Battleship Maine in Havana harbor on February 15, 1898.
Concept note-2: -The Spanish-American War was a conflict between the United States and Spain that effectively ended Spain’s role as a colonial power in the New World. The United States emerged from the war as a world power with significant territorial claims stretching from the Caribbean to Southeast Asia.
Concept note-3: -The United States went to war with Spain in 1898 for three different reasons: social, economic, and political. These causes were stimulated by commercialism and nationalism.