In which year was NATO established?
A.1949
B.1945
C.1950
D.1947

Hint: late 1950s, the communist expansion alarmed the western European countries and the USA to form the North Atlantic Treaty Organization (NATO). After World War 2, prevalent ideologies divided Europe into two ideologies, one with communism/ Socialism, and others with Capitalism.

 Complete answer:
In the year 1949, NATO was established.

Hence, the correct answer is option (A).

Additional information:
North Atlantic Treaty (Washington Treaty) of April 4, 1949, established the North Atlantic Treaty Organization (NATO). In the beginning, its members were Belgium, Canada, Norway, Portugal, Denmark, France, Iceland, Italy, Luxemburg, the Netherlands, the UK, and the USA. Over time, other countries became its members. For example, Greece, West Germany, Spain, Latvia, Lithonia, Estonia, and so on. North Atlantic Council consists of ministerial representatives of the member States. Its military organization contains all that is needed in wartime having the military staff of the member States. It subsumes two important commands. i.e. Allied Command Operations (ACO), and Allied Command Transformation (ACT).during the cold war period, NATO relied partly on the threat of massive retaliation from the USA to counter the Warsaw pact. Later, it adopted a flexible response strategy under which dual control or dual key system (two countries’ control) to have a veto to use the military weapons was incorporated.

Note: In the late 1990s, the objectives of NATO were shifted to the cooperation and dialogue with its adversaries and to resolve the conflicts in Europe. It established the North Atlantic Pacific Council that was later replaced by Euro Atlantic Pacific Council.