|Question 12Verbal

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Text
A bias toward studying diversity at a local rather than a continental scale was one of the many shortcomings researcher Sonia Llorente-Culebras and her team _____ analyzing nearly 400 biodiversity studies from around the globe.
Which choice completes the text so that it conforms to the conventions of Standard English?
discovered: while
A
discovered, while
B
discovered while
C
discovered. While
D