A través de que mecanismos se enfrentaron E. E.U. U y URSS en guerra fría?

a causal relation between two events exists if the occurrence of the first causes the other. the first event is called the cause and the second event is called the effect. a correlation between two variables does not imply causation.

explanation:

the speech convinced americans that the ussr was an enemy, rather than an ally, which led to the creation of the truman doctrine.

either d or b, i'm not to sure. but my gut tells me it's prob going to be b