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: Some infected horses show ____ signs and become chronic carriers of the disease.\Question: Choose the right answer from options given a) nine b) six c) four d) no

Output: d


Input: Consider Input: Fever usually lasts for an average of ____ days in adults.\Question: Choose the right answer from options given a) zero b) three c) nine d) two

Output: b


Input: Consider Input: Grays often hole up for ____ or four days at a time during severe weather.\Question: Choose the right answer from options given a) ten b) zero c) three d) one


Output: c