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:
Chickens take about six to ____ weeks to grow.\Question: Choose the right answer from options given a) eight b) two c) no d) five

Ex Output:
a


Ex Input:
Smoking is responsible for one out of ____ American deaths.\Question: Choose the right answer from options given a) five b) six c) nine d) seven

Ex Output:
a


Ex Input:
Some care providers begin contraceptives as early as five days postpartum, or as late as ____ weeks.\Question: Choose the right answer from options given a) no b) eight c) two d) four

Ex Output:

d