Question

the term “retroflex” derives from latin and means “bent back,” an apt descriptor for the branch of consonants—retroflex consonants—pronounced with the tongue curling up and back in the mouth. in many languages, including english, these consonants are ______ in some dialects of mandarin, however, four such consonants (\ch.\, \sh.\, \zh.\, and
\) are relatively common. which choice completes the text so that it conforms to the conventions of standard english? a. rare and b. rare. c. rare d. rare:

Explanation:

The sentence is making a simple statement about the rarity of retroflex consonants in English compared to their common - ness in some Mandarin dialects. A comma, semicolon, or "and" are not needed here as it is a straightforward description. The most appropriate choice is the simple adjective "rare" without any additional punctuation or conjunctions.

Answer:

C. rare