What is a marxist principle that the above quote to explain?

the means of production should be in the hands of the upper class.
socialism would never uphold the rights of the working class.
society should remain a competition between the classes.
the best society is one without socioeconomic classes.

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.