(A) Northern Russia
(B) Europe
(C) ** Caribbean/ Pacific
(D) Mars
EXPLANATIONS BELOW
Concept note-1: -General reasons were the imperial debt policy, increasing German investments, submarine warfare and US economic interests.
Concept note-2: -Following the war, Spain’s last colony in the Americas, Puerto Rico, became an unincorporated territory of the United States.
Concept note-3: -The Spanish-American War of 1898 brought Washington into a new imperial role in the Caribbean, and over the following years the US government conducted a series of military interventions and completed the massive construction of the Panama Canal.
Concept note-4: -The strategic value of Puerto Rico for the United States at the end of the nineteenth century centered in economic and military interests. The island’s value to US policy makers was as an outlet for excess manufactured goods, as well as a key naval station in the Caribbean.