(A) Guam
(B) Bermuda
(C) Panama
(D) ** Colombia
EXPLANATIONS BELOW
Concept note-1: -In January 1903, Colombia signed a treaty to permit the United States to build the Panama Canal. The treaty gave the United States a canal zone. This was a piece of land ten kilometers wide across Panama.
Concept note-2: -The area that became Panama was part of Colombia until the Panamanians revolted, with U.S. support, in 1903. In 1904, the United States and Panama signed a treaty that allowed the United States to build and operate a canal that traversed Panama.
Concept note-3: -The Panama Canal was first developed following the failure of a French construction team in the 1880s, when the United States commenced building a canal across a 50-mile stretch of the narrow Panama isthmus in 1904.
Concept note-4: -The separation of Panama from Colombia was formalized on 3 November 1903, with the establishment of the Republic of Panama.
Concept note-5: -On November 3, 1903, the nation of Panama was born. The U.S quickly assumed parental interest. Americans had written the Panamanian Constitution in advance; the wife of pro-canal lobbyist Phillipe Bunau-Varilla had sewn the country’s first flag.