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Verbal·Standard English Conventions·Boundaries
hard
All member nations of the North Atlantic Treaty Organization, or NATO—including Iceland, which joined in 1949; Hungary, which joined in 1999; and Bulgaria, which joined in __________ are committed to NATO’s principle of collective defense, each member pledging to defend all others.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
2004;
B
2004,
C
2004
D
2004—