Question

Which is the best summary of the events of the Cuban Missile Crisis?
The United States enacted an embargo against Cuba to pressure the Soviet Union into removing the missile bases it had built there.
The United States discovered Soviet missile bases in Cuba and blockaded the island; a secret agreement led to the removal of missiles from Cuba and Turkey.
The Soviet Union placed a blockade around Cuba; the United States responded by enacting an embargo against the nation.
The United States discovered Cuban missile bases in Florida and enacted an embargo against Cuba; Cuba relocated its missiles.

Answer 1

"The United States discovered Soviet missile bases in Cuba and blockaded the island; a secret agreement led to the removal of missiles from Cuba and Turkey."

This is the best summary — the U.S. imposed a naval "quarantine" around Cuba after discovering Soviet medium-range ballistic missiles there, and a negotiated settlement removed the missiles from Cuba (with a secret U.S. concession to remove Jupiter missiles from Turkey and a public pledge not to invade Cuba).