|Question 19Verbal

Source Texts

Text
The Roman historian Sallust's Bellum catalinae, a chronicle of a coup attempt, is an extant work: it can still be read. By contrast, lost works like Sallust's history of the Roman Republic, Histories—no copy of which exists—       known to antiquarians only through references in extant works.
Which choice completes the text so that it conforms to the conventions of Standard English?
have become
A
becomes
B
has become
C
is becoming
D