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Verbal·Standard English Conventions·Boundaries

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For scientists to produce new iron nanoparticles of a specific size or strength, they must first be able to monitor reactions between oxygen and existing iron nanoparticles at a near-atomic level of detail. Fortunately, chemistry __________ and his colleagues at Temple University recently developed a new approach that does just that.

Which choice completes the text so that it conforms to the conventions of Standard English?

A

professor Yugang Sun

B

professor Yugang Sun,

C

professor, Yugang Sun

D

professor, Yugang Sun,