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: Rabbits reach sexual maturity between three and ____ months of age.\Question: Choose the right answer from options given a) three b) seven c) six d) zero
Example Output: c

Example Input: Ladybugs have ____ legs and keep their wings tucked away until they are ready to fly.\Question: Choose the right answer from options given a) six b) eight c) one d) zero
Example Output: a

Example Input: Incubation takes about four weeks, and the owlets fledge after about ____ month.\Question: Choose the right answer from options given a) ten b) three c) six d) one
Example Output:
d