Final answer:
An Eastern European communist country would have been most likely to join the Warsaw Pact, a military alliance of the USSR and Eastern European communist nations formed in response to the creation of NATO.
Step-by-step explanation:
The country most likely to join the Warsaw Pact would be an Eastern European communist country. Considering the historical context, the Warsaw Pact was a military and political alliance formed in 1955 that consisted mainly of the Soviet Union and Eastern European communist nations, such as Albania, Bulgaria, Czechoslovakia, Hungary, Poland, Romania, and East Germany. These nations were under the influence or control of the Soviet Union and were seen as a collective defense arrangement to counter the Western alliance, NATO (North Atlantic Treaty Organization). African socialist countries, Asian democratic countries, and Western European capitalist countries were not aligned with the Warsaw Pact, which was specifically a union for the communist Eastern Bloc in response to the formation of NATO.
During the Cold War, the Eastern European nations were established as communist states mirroring the Soviet Union as a buffer against potential attacks from the West. Therefore, the most likely answer to which country would have been most likely to join the Warsaw Pact is an Eastern European communist country.