Answer :
4. The two countries that were members of NATO are option C. Italy and the United Kingdom.
5. In response to NATO, the Soviet Union formed the Warsaw Pact with b. Eastern European nations.
Both NATO and the Warsaw Pact were military defense alliances after World War II. NATO was formed in 1949 and now includes the United States. The Warsaw Pact included 11 Communist member nations before it dissolved in 1991.