Archived within the storied libraries of Timbuktu, a West African city prominent during the Songhai Empire, is Straight Dosage and Sufficient Scent, one of the city’s hundreds of thousands of historical manuscripts, each of which __________ researchers insight into Timbuktu’s tenure as a center of trade and education.
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Verbal·Standard English Conventions·Form, Structure, and Sense
mediumWhich choice completes the text so that it conforms to the conventions of Standard English?
A
offers
B
are offering
C
offering
D
offer