Historically, why has the united states restricted trade to cuba?

a) because cuba is too close geographically to the united states for competition.
b) because the united states did not want the cubans to flood the american market with cuban cigars.
c) because of cuba's communist government and its failed protection of the human rights of cuban citizens.
d) because cuba failed to allow the united states to annex the nation of cuba after the spanish american war.

The third alternative is correct (C).

In 1959 Cuba was seized by Fidel Castro, who overthrew the dictator Fulgencio Batista's power. This historical process became known as the Cuban Revolution. However, the new government of Cuba had communist ideological bias and military support from the Soviet Union. In this context, there was an anti-capitalist and anti-American sentiment in that country that led the US to restrict trade with Cuba.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.