|Question 16Verbal

Source Texts

Text
Both Heinrich Boll and Camilo Jose Cel.a have been commended for ____ contributions to literature, perhaps most notably when the Swedish Academy awarded Ball 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?
it's
A
their
B
its
C
they're
D