(A) By invading Colombia and demanding the land as part of a peace treaty
(B) By taking advantage of Open Door Policy trade benefits
(C) By negotiating a purchase agreement with Colombia
(D) ** By encouraging and supporting an independence movement in Panama
EXPLANATIONS BELOW
Concept note-1: -In 1903, Panama declared its independence from Colombia in a U.S.-backed revolution and the U.S. and Panama signed the Hay-Bunau-Varilla Treaty, in which the U.S. agreed to pay Panama $10 million for a perpetual lease on land for the canal, plus $250, 000 annually in rent.
Concept note-2: -On November 6, 1903, the United States recognized the Republic of Panama, and on November 18 the Hay-Bunau-Varilla Treaty was signed with Panama, granting America exclusive and permanent possession of the Panama Canal Zone. In exchange, Panama received $10 million and an annuity of $250, 000 beginning nine years later.
Concept note-3: -The United States established diplomatic relations with Panama in 1903 following its separation from Colombia. That year, through the Hay/Bunau-Varilla Treaty, Panama granted the United States rights to a zone spanning the country to build, administer, fortify, and defend an inter-oceanic canal.