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: Children of alcoholics are ____ times more likely than other people to become alcoholics themselves.\Question: Choose the right answer from options given a) zero b) four c) nine d) two
Example Output: b

Example Input: Most women notice their breasts become fuller and firmer within the first six to ____ weeks.\Question: Choose the right answer from options given a) four b) eight c) zero d) ten
Example Output: b

Example Input: Indoor cats can live up to ____ times longer than an outdoor cat.\Question: Choose the right answer from options given a) one b) seven c) eight d) four
Example Output:
b