Refer to the passage. "During World War II, the Communist Party of the Soviet Union partially abandoned an approach to international relations which presupposed the inevitability of a clash between communism and capitalism. Since the end of the war, however, Soviet publicists have revived three persistent themes of Marxist thinking—the inevitability of: (1) a revolutionary class struggle within each capitalist country; (2) conflicts between capitalistic Powers; and (3) intervention in Soviet affairs by the capitalistic Powers. Recent authoritative Soviet statements have cited a speech made by Stalin in 1928 in which he clearly enunciated these themes. Stalin’s recent electoral addresses, as well as those of other members of the Politburo of the Communist Party, attacked capitalism as a breeder of world conflicts and clearly indicated that the goal of Soviet postwar economic planning is the strengthening of the Soviet war potential.”

"Soviet Policy toward the Western Powers,” an internal White House memorandum concerning Soviet foreign policy, April 4, 1946

Which of the following best describes how the United States and the Soviet Union sought to maintain influence in light of the themes described in the memorandum?

Each sought to decrease tension among its allies through arms-reduction discussions.
Each oversaw the formation of a military-alliance system for protection from the other.
Each transparently disclosed its social and governmental activities to the world.
Each relied on its powerful economy to ensure the loyalty of its allies.