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Verbal·Standard English Conventions·Boundaries
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Advocacy groups the Orden Hijos de América and El Teatro Campesino were founded on October 13, 1921, and September 26, 1965, respectively—two        given each group’s commitment to advancing Latino rights, are important to US civil rights history.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
dates that,
B
dates that
C
dates, that
D
dates that—