Answer :
A major impact of the Cuban Missile Crisis was that it brought the world dangerously close to nuclear war. This crisis showed that there was great potential for a nuclear armed conflict to potentially break out.
Nuclear war became a near possibility after the end of the Cuban Missile crisis.
What happened in the Cuban Missile crisis?
The Cuban Missile crisis led to a situation where the entire world, especially in Europe and America, were keen on building themselves as strong nuclear-powered nations.
As a result, the global sentiments gave the rise to war-like situation and soon after the end of this event. The nuclear war would have begun if the negotiations were not made between the US and the Soviet Union.
Hence, option D holds true regarding the Cuban Missile crisis.
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