Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Example Input: Today there are ____ federal states, each based on cultural affiliations.\Question: Choose the right answer from options given a) one b) nine c) seven d) zero
Example Output: b

Example Input: Bilingual teachers are more than people who speak ____ languages.\Question: Choose the right answer from options given a) five b) two c) three d) ten
Example Output: b

Example Input: Honey bees produce beeswax from ____ paired glands on the underside of their abdomen.\Question: Choose the right answer from options given a) seven b) eight c) zero d) ten
Example Output:
b