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').

Input: Consider Input: Most gerbils live three to ____ years and have few health problems.\Question: Choose the right answer from options given a) three b) four c) seven d) zero

Output: b


Input: Consider Input: Reality is more than what can be perceived with the ____ senses.\Question: Choose the right answer from options given a) five b) four c) ten d) one

Output: a


Input: Consider Input: Full moons occurs once every twenty ____ and One half days.\Question: Choose the right answer from options given a) ten b) nine c) eight d) four


Output: b