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: Eastern cottontails have ____ different fur coats each year.\Question: Choose the right answer from options given a) five b) two c) eight d) six
Example Output: b

Example Input: Most polyps cause no symptoms and take ____ to seven years to change to cancer.\Question: Choose the right answer from options given a) four b) two c) five d) eight
Example Output:
c