(A) serving as doctors in the Panama Canal Zone
(B) ** operating abroad in foreign locations such as Hawaii
(C) testifying to Congress about conditions in Latin America
(D) working on US naval ships during the Spanish American War
EXPLANATIONS BELOW
Concept note-1: -Alfred Thayer Mahan supported moving the United States into a position of power by-strengthening U.S. naval capacity. Missionaries played a role in the territorial expansion of the United States by-operating abroad in foreign locations such as Hawaii.
Concept note-2: -Hawaii was attractive to American imperialists for two reasons. First, its natural resources, especially sugar, could be exploited. Second, it was an ideal location for a naval base.
Concept note-3: -The growing popular demand for U.S. intervention became an insistent chorus after the still-unexplained sinking in Havana harbor of the American battleship USS Maine, which had been sent to protect U.S. citizens and property after anti-Spanish rioting in Havana.
Concept note-4: -In order for American industrialists to gain greater access to Asian markets, the United States sought to expand into new territories in the Pacific region. As a result, before the War of 1898, the United States purchased Alaska from Russia and annexed Hawaii.