What was the significance of the naval quarantine of Cuba?

A.
If the United States did not remove its ships, then the Soviet Union would not remove its missiles from Cuba.

B.
If Soviets snuck past U. S. ships, then the two countries would be at war.

C.
If the United States snuck past Soviet ships, then the two countries would be at war.

D.
If the Soviet Union did not remove its ships, then the United States would not remove its missiles from Cuba.

D.

If the Soviet Union did not remove its ships, then the United States would not remove its missiles from Cuba.

Explanation:

A naval quarantine is when one nation declares that no naval vessels will be allowed to cross an imaginary line within x number of miles of another nation. ... The US issued a naval quarantine against Cuba when USSR missile launchers were discovered in Cuba.

The United States imposed such a quarantine on Cuba on Oct. 23, 1962, to force the removal of Soviet nuclear missiles that had been installed there. The quarantine blocked shipments of offensive weapons - missiles, bombers, bombs, warheads and support equipment - to the island.

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