(A) ** Open-Door Policy
(B) Colonialism
(C) Monroe Doctrine
(D) Roosevelt Corollary
EXPLANATIONS BELOW
Concept note-1: -The Open Door policy was a statement of principles initiated by the United States in 1899 and 1900. It called for protection of equal privileges for all countries trading with China and for the support of Chinese territorial and administrative integrity.
Concept note-2: -The Open Door Policy was a clever move on the part of the United States to create trade opportunities between the U.S. and China while additionally asserting American interests in the Far East. In the short term, the Open Door Policy allowed the United States to expand its markets for industrialized goods.
Concept note-3: -The Open Door Policy was a major statement of United States foreign policy issued in 1899 and 1900 intended to protect the rights of all countries to trade equally with China and confirming multi-national acknowledgment of China’s administrative and territorial sovereignty.