The United States considered Cuba a threat because
A. Cuban exiles had informed the U. S. government about missiles in Cuba.
B. the Cuban government had been overthrown and was unstable.
C. Castro and Kennedy did not trust each other.
D. Cuba, which was only 90 miles away, had ties with the Soviets.

D

Explanation:

because The United States and Russia were at Cold war and having Cuba close to The US was dangerous since Russia could plant missiles aimed at the US

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.