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').

Ex Input:
Women account for more than ____ out of five deaths from stroke.\Question: Choose the right answer from options given a) three b) six c) eight d) nine

Ex Output:
a


Ex Input:
Litters contain from one to ____ kittens, and tend to be much larger when prey is abundant.\Question: Choose the right answer from options given a) three b) four c) two d) seven

Ex Output:
b


Ex Input:
Birds begin dying of fowl cholera ____ to nine days after exposed to the virus.\Question: Choose the right answer from options given a) no b) seven c) two d) four

Ex Output:

d