SAT Practice74f18890-70bc-4a2b-8608-64249104bbee
Practice one SAT question at a time

Questions come from the Bluebook question bank.

The Proto-Nilotic language, common ancestor of fifty-five African languages with similar linguistic properties, blank like all protolanguages, hypothetical: there’s no direct evidence these ancestral languages actually existed.

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