Nhận biết (M1)

The state of Washington has classified the American bullfrog as an invasive species that could outcompete some of the state's native species. But researchers Alejandro Camacho and Jason McLachlan have pointed out that Earth's climate is changing in ways that challenge such classifications. Climate changes may cause animals to leave their current ranges and establish new ones. Climate changes may also create good habitats in areas where a species couldn't live previously. These observations suggest that _________

Which choice most logically completes the text?

• A.

  even if Earth's climate doesn't change in the way scientists predict, the American bullfrog will likely establish itself in Washington.

• B.

  Washington was previously home to some American bullfrogs but they were outcompeted by invading species.

• C.

  it's useful at present for Washington to distinguish between invasive and native species in some instances but not in the case of the American bullfrog.

• D.

  Washington may come to find that categorizing the American bullfrog as invasive no longer reflects environmental reality.