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: Nymphs emerge in ____ to seven days and flatten themselves against the leaf to feed.\Question: Choose the right answer from options given a) one b) five c) nine d) two
Example Output: b

Example Input: Breast cancer strikes one out of every ____ American women.\Question: Choose the right answer from options given a) one b) nine c) no d) six
Example Output: b

Example Input: Many languages have ____ quite different types of equational sentences.\Question: Choose the right answer from options given a) eight b) nine c) two d) six
Example Output:
c