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: Chipmunks produce one or ____ litters a year.\Question: Choose the right answer from options given a) three b) one c) ten d) two

Output: d


Input: Consider Input: Psychiatrists say that one in ____ people are mentally ill.\Question: Choose the right answer from options given a) one b) two c) four d) nine

Output: c


Input: Consider Input: Infected rodents carry and secrete the virus for about ____ days.\Question: Choose the right answer from options given a) no b) five c) one d) seven


Output: d