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: Sexual reproduction is varied in ____ ways.\Question: Choose the right answer from options given a) seven b) two c) five d) three
Example Output: d

Example Input: Most roots require from three to ____ weeks to dry sufficiently to be safe.\Question: Choose the right answer from options given a) seven b) five c) three d) six
Example Output: d

Example Input: Litters contain from ____ to four kittens, and tend to be much larger when prey is abundant.\Question: Choose the right answer from options given a) two b) no c) one d) zero
Example Output:
c