Correct Answer:
C. 32
NATO, the North Atlantic Treaty Organization, is a military alliance established in 1949. Its membership has expanded over the decades to include more European nations. As of early 2024, with the recent additions of Finland (2023) and Sweden (2024), NATO comprises 32 member states. These countries commit to mutual defense in response to an attack by any external party. The other options, 29 and 35, are incorrect or outdated figures for the alliance's current membership count, while '–' is not a valid number.