Nhận biết (M1)

The arrival of humans to the Americas is thought to have __________ a sudden decrease in biodiversity throughout the continents. Although the extinction of species like the toxodon was likely the result of a combination of factors, from decreasing food sources to habitat destruction, most of these factors can be directly tied to the presence of humans.

Which choice completes the text with the most logical and precise word or phrase?

• A.

  followed

• B.

  prolonged

• C.

  counteracted

• D.

  triggered