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:
Southern moles are six to ____ inches long and weigh three to four ounces.\Question: Choose the right answer from options given a) zero b) nine c) five d) seven

Ex Output:
d


Ex Input:
Ruminants have an even number of toes on each foot and a stomach with either three or ____ chambers.\Question: Choose the right answer from options given a) four b) two c) seven d) five

Ex Output:
a


Ex Input:
Most people eat more than three times that amount at ____ time.\Question: Choose the right answer from options given a) ten b) one c) two d) seven

Ex Output:

b