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').

Input: Consider Input: Streptomyces are of special interest for ____ reasons.\Question: Choose the right answer from options given a) nine b) seven c) four d) two

Output: d


Input: Consider Input: Embrasures have ____ functions.\Question: Choose the right answer from options given a) three b) seven c) zero d) nine

Output: a


Input: Consider Input: Most pedigrees show ____ to five generations.\Question: Choose the right answer from options given a) ten b) three c) zero d) four


Output: b