Answer:
C. Both were military alliances among countries with similar beliefs
Step-by-step explanation:
NATO and the Warsaw Pact were essentially the same exact thing but different politically. NATO was a military alliance amongst post-WW2 European and North American democracies, who would later recruit more European democracies. NATO's goals were to combine military strength to challenge the Soviet Union and also guarantee the independence NATO countries from the Soviet Union.
The Warsaw Pact was a direct response to NATO and consisted of Soviet puppet and satellite states as well as other communist European nations. The goal was to also combine military might to protect their communist interests, and just like NATO, guarantee the nations in the Warsaw Pact independence from capitalists threats.