Which of these political alliances was put together to ensure military and political protection of its members after world war 2.
a. north atlantic treaty organization (nato)
b. african union (au)
c. european union (eu)
d. united nations (un)

Option A, North Atlantic Treaty Organization (NATO), is the right answer.

Explanation:

NATO is the abbreviation of the North Atlantic Treaty Organization. Establish on 4th April 1949 by the North Atlantic Treaty, NATO is a military alliance. This organization tried to create a counterweight to the army of the Soviet Union stationed Eastern and Central Europe following the Second World War. NATO is an organization which forms a policy of collective resistance whereby its member states conform to mutual support in acknowledgement to an attack from outside.

a. favoring native born americans over immigrants.