Nhận biết (M1)

In 2022, Frank Condori, who studies amphibians, joined a research team for a 38-day expedition to the remote yet populous region of Alto Mayo, Peru. It had long been assumed that regions with large human __________ were unlikely to yield discoveries of new species, but team members found 27 such species, including a new species of tropical climbing salamander.

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

• A.

  populations which

• B.

  populations

• C.

  populations, which

• D.

  populations;