While some biologists cite the biological species concept (Mayr 1942), others adhere to the genotypic cluster species concept (Mallet 1995), with at least fourteen other concepts used across the field. Such lack of consensus, however, isn’t necessarily cause for alarm. Scholars supporting a pluralist approach—in place of a single, monistic concept—to defining a species __________ that a diversity of species concepts fits their equally diverse applications throughout the discipline.
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Verbal·Standard English Conventions·Form, Structure, and Sense
easyWhich choice completes the text so that it conforms to the conventions of Standard English?
A
to argue
B
argues
C
is arguing
D
argue