In 2022 Kevin Del Águila, who studies environmental DNA, joined a research team for a 38-day expedition to Alto Mayo, a populous area in the north of Peru. It had long been assumed that regions with large human populations would be unlikely to yield discoveries of new species. Nevertheless, Del Águila and the other team members __________ for such species in Alto Mayo found 27 of them, including 3 new amphibian species.
Desmos Graphing Calculator
Verbal·Standard English Conventions·Form, Structure, and Sense
hardWhich choice completes the text so that it conforms to the conventions of Standard English?
A
searching
B
had searched
C
searched
D
search