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: Cows have four stomachs, and the first ____ yield merchantable tripe.\Question: Choose the right answer from options given a) two b) five c) zero d) three
Example Output: d

Example Input: Obesity is, in general, the result of personal choices and poses ____ risk of communication.\Question: Choose the right answer from options given a) four b) six c) zero d) seven
Example Output: c

Example Input: State law requires every dog or cat to be vaccinated at ____ months of age and annually thereafter.\Question: Choose the right answer from options given a) nine b) five c) four d) no
Example Output:
c