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Verbal·Standard English Conventions·Boundaries
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The Austronesian language family comprises some 1,200 languages—including the        Madurese and Bikol, which are spoken by 14 million and 4.6 million speakers, respectively—and accounts for one-fifth of the world’s languages, making it of keen interest to linguists like Diane Massam.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
languages
B
languages—
C
languages:
D
languages,