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:
Cats have ____ lives.\Question: Choose the right answer from options given a) five b) one c) two d) nine

Ex Output:
d


Ex Input:
Orangutans spend up to ____ hours a day eating or foraging for food.\Question: Choose the right answer from options given a) seven b) nine c) three d) six

Ex Output:
d


Ex Input:
Most birds have ____ toes on their feet.\Question: Choose the right answer from options given a) zero b) three c) two d) four

Ex Output:

d