The US government was taking action against Cuba because Castro's support for actions that endangered the Western world, particularly during a vital time for economic reform in the Americas. This context highlights the perceived threat posed by his regime, rather than just his dictatorial or revolutionary characteristics. Adlai Stevenson pointed out that the danger was rooted in Castro's direct involvement in an invasion of the hemisphere. ;
The US government took action against Cuba primarily because Fidel Castro supported actions that endangered the Western world, particularly through his alliances with the Soviet Union. Castro's government was perceived not only as dictatorial but also as a direct threat during critical moments like the Cuban Missile Crisis. Thus, the correct choice is option C.
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