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: Widowed men are ____ times as likely to be murdered.\Question: Choose the right answer from options given a) two b) four c) three d) no
Example Output: b

Example Input: Brachiopods are superficially similar to bivalves, both having ____ shells.\Question: Choose the right answer from options given a) two b) eight c) seven d) one
Example Output: a

Example Input: Wild dingoes can live for up to ____ years but usually live for more like five or six years.\Question: Choose the right answer from options given a) ten b) zero c) three d) five
Example Output:
a