Which of the following measures was taken by President John F. Kennedy in response to the discovery of Soviet missile sites on the island of Cuba?
a. Concerned about additional Soviet aggression. he authorized the Berlin Wall to be built protecting West Berlin.
b. He issued a blockade and ultimatum ordering the Soviets to turn back their ships and dismantle the missile sites already under construction.
c. He authorized the Bay of Pigs invasion of Cuba in order to dismantle both the missile sites and to topple Castro's government
d. He authorized both a trade embargo and travel restriction between the United States and Cuba.
e. He ordered the Pentagon to conduct airstrikes in order to destroy the missile sites.