What was the answer to this question?

Some places that were once part of the Spanish Empire, such as Luxembourg, reveal few traces of a past connection to Spain, linguistic or otherwise. In contrast, Cuba broke free from the Spanish Empire in the 19th century, yet still bears its imperial history in the language, Spanish __ spoken by most current residents of Cuba. Which choice completes the text so that it conforms to the conventions of standard English?

A. Is being
B. Will be
C. Being
D. Is