Why was the united states concerned about nuclear missiles in cuba?
a. the missiles would be used to bully other island nations.
b. the missiles were unstable and could cause ecological disaster.
c. the missiles could be used to strike the united states.
d. the missiles stopped the united states from invading cuba.

I believe the answer is: c. The missiles could be used to strike the United States.

Cuba and united states adopted two different ideologies that originated since the cold war era. ( Cuba is a communistic country and United states is a democratic-capitalist country). Because of this, both of these nations are on bad term with one another.

absolutly 100% never let anyone fall asleep for 24 hours after a head injury!

d is the answer hope this