Nhận biết (M1)

Both Heinrich Böll and Camilo José Cela have been commended for __________ contributions to literature, perhaps most notably when the Swedish Academy awarded Böll the Nobel Prize in Literature in 1972 and Cela in 1989.

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

• A.

  it's

• B.

  their

• C.

  its

• D.

  they're