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: Giraffes sleep less than ____ hours a day.\Question: Choose the right answer from options given a) two b) six c) seven d) ten

Output: a


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: Some species bear living offspring only every three to ____ years.\Question: Choose the right answer from options given a) one b) five c) eight d) seven


Output: b