HELP WORLD HISTORY COLD WAR 8.3 effects of the cold war on collegeboard The level of military engagement between Western nations and the Soviet Union referred to in the passage is best explained by which of the following developments after the Second World War?

(A) The economic decline of communist states made it impossible for them to transport large armies to distant regions.

(B) The ability of the United Nations to send peace-keeping forces limited the scale of the involvement of major military powers in regional conflicts.

(C) The continued importance of resource-rich regions in Africa to economic development in the West and the Soviet Union discouraged them from engaging in large-scale conflicts that could cause vast destruction.

(D) The possession of nuclear weapons by the United States and the Soviet Union made it too dangerous for Western nations and the Soviet Union to engage in large-scale military conflict with each other.