Which action led to the cuban missile crisis?
the testing of ship-to-ship missiles in cuba by the soviets
the construction of nuclear missile sites in cuba
an attack on cuban naval vessels by u. s. ballistic missiles
the sale of nuclear missile technology to cuba

The correct answer for the question that is being presented above is this one: "the construction of nuclear missile sites in Cuba." The action led to the Cuban Missile Crisis is the construction of nuclear missile sites in Cuba. Krushchev, the communist leader of the USSR armed Castro (Cuba)  with nuclear weapons which were discovered by an American plane.