The most accurate response that describes the perceived threat of Allende's socialist government in Chile to other countries and the world is:
"During the Cold War, the U.S. and other capitalist countries saw socialism as akin to communism. They associated the ideology with the Soviet Union, and said it was a threat to democracy worldwide."
This reflects the general sentiment during the Cold War, where socialist movements were often viewed with suspicion and fear by capitalist nations, particularly in the context of the U.S.-Soviet rivalry.