The Cuban Missile Crisis, arguably the closest the world has come to nuclear war, was resolved when A. US spy planes photographed the Soviet missiles being housed in Cuba, removing the Soviets' element of surprise and making
further action on their part futile.

B. Cuba agreed to dismantle their offensive missiles and return them to Soviet Union in exchange for dismantling similar weapons
housed in Turkey by the US.

C. the US Army invaded Cuba via the Bay of Pigs and successfully captured the Soviet stockpile of weapons.

D. a secret force sent into Cuba by the CIA managed to destroy the Soviet missiles' guidance systems.