Nhận biết (M1)

During winter in the Northern Hemisphere, the fast-moving river of air called the polar jet stream often shifts south, bringing cold arctic air to places that are normally warmer. __________ summer brings a northward shift of this jet stream, allowing warmer air to spread across much of North America and Europe.

Which choice completes the text with the most logical transition?

• A.

  Indeed,

• B.

  Despite this,

• C.

  Conversely,

• D.

  For instance,