Which of the Following Is NOT an Explanation for the Commencement

Which of the following is NOT an explanation for the commencement of the Cold War?

A) The United Nations was viewed as a pro-American organization,so the Soviets refused to cooperate with it.
B) Since there were only two superpowers,it was inevitable that they would compete for influence in Europe.
C) Disagreements were inevitable between a capitalist democracy and a communist one-party system.
D) Interactions between the United States and the Soviet Union became hostile and suspicious.
E) Each viewed the other as a threat to its allies in Europe.