SAT Question 856b495d: Form Structure And Sense answer and explanation

English - Form Structure And Sense - Plural And Possessive Nouns
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In the early twentieth century, Joseph Kekuku and other Hawaiian ______ in the mainland United States to the bright and lilting sound of the kīkā kila, or Hawaiian steel guitar. The instrument soon became a fixture in American blues and country music.
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Difficulty:Easy
Which choice completes the text so that it conforms to the conventions of Standard English?