A. 12
B. 20
C. 51
D. 17
- NATO was created by 12 countries from Europe and North America on 4 April 1949.
- Since then, 19 more countries have joined NATO through nine rounds of enlargement (in 1952, 1955, 1982, 1999, 2004, 2009, 2017, 2020 and 2023).
A. 12
B. 20
C. 51
D. 17