Answer:
The correct answer is D. An Eastern European communist country would have been most likely to join the Warsaw Pact.
Step-by-step explanation:
The Warsaw Pact, officially the Treaty of Friendship, Cooperation and Mutual Assistance, was officially a military alliance with a number of Eastern European countries as members aimed at maintaining closer military cooperation. In fact, the alliance was a cementing and formalization of Soviet power over communist Eastern and Central Europe, with the Soviet completely dominating the Warsaw Pact. The organization was founded on May 14, 1955 in response to West Germany's accession to NATO and was officially dissolved at a meeting in Prague on July 1, 1991.