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: Infants can tell their mothers from other mothers in ____ days.\Question: Choose the right answer from options given a) no b) zero c) five d) three

Output: d


Input: Consider Input: Bees possess ____ eyes.\Question: Choose the right answer from options given a) three b) five c) one d) ten

Output: b


Input: Consider Input: Precision is the key to storing ____ bits per cell.\Question: Choose the right answer from options given a) seven b) two c) ten d) nine


Output: b