SAT Question 831b55ec: Boundaries answer and explanation

English - Boundaries - No Punctuation Within Clause
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Louise Bennett (1919–2006), also known as “Miss Lou,” was an influential Jamaican poet and folklorist. Her innovative poems ______ the use of Jamaican Creole (a spoken language) in literature.
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Difficulty:Easy
Which choice completes the text so that it conforms to the conventions of Standard English?